Nickel Boron usually costs more than Nitride and that money goes to more performance. 8620 M16 Style Carrier PVD Coating by Ionbond Heat Treated I used Toolcraft nitride bcgs for my last 2 builds and have been more than happy with them. A few definitely deserve to he there, but not all. FailZero 7.62 x 39 EXO Nickel Boron Bolt Carrier Group $ 179.99 $ 171.99 More Info. The gold color is unique and makes a very nice contrast against the matte black of the AR15. Mil Spec is a Specification. This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR15 upper receivers. Click for Details. I'm sure they have some advances with their $500 BCG but mine won't be in for months. Free Shipping on orders of $199+ |Use Code: SITESHIP | Restrictions apply, Offer ends 3/5/2023. [ARCHIVED THREAD] - Disappointed in Nickel Boron BCG. Their mystic black has a friction coefficient of 0.01 for comparison NiB is 0.5-0.8, DLC is new and its 0.02-0.15(something else to consider when looking at coatings), TiN I believe is 0.45. Hand-Picked Daily GUN DEALS, and Exclusive Coupons Codes >>>, choosing a lightweight bolt carrier group. Shocked it and a few others didnt make the list when I saw of the some names that did. Ionbond Diamond Like Carbon (DLC) Coating is a state-of-the-art metal finish applied through a Physical Vapor Deposition (PVD) process. In fact, chrome BCGs are somewhat difficult to find today, but worth it if you can find one. The Best Black BCG Finish - Phosphate vs Nitride vs DLC. Call Colt firearms directly and order from them. Ionbond Black DLC will not chip, crack or peel, providing you with years of reliable function and protection against wear. Thanks! All this NiB and no mention of the Young Manufacturing chromed M16 BCG and bolt? Designed for use with all 5.56-NATO-based cartridge cases. , Whats the Difference Between a Full Auto and Semi-Auto Bolt Carrier Group? If you're looking for the best bolt carrier group for sale, you need to shop with Surplus Ammo. It physically moves backward into the buffer tube as the gun is fired and does the work of chambering the next round when pushed back into battery by the buffer. Popular seach, Category Our Nickel Boron coating reduces friction, simplifies cleaning and maintenance, and extends the life of critical components. All laws subject to our interpretation and are arbitrarily drafted no matter what they actually say. And more exotic stuff like Titanium Nitride (TiN) is gold and pretty. If none of that is you then Black Nitride and done! 5.56/300 Blk or 6.8 SPC Nickel Boron Bolt Carrier Group $150.00 - $160.00 Choose Options AR-15/AR-10 Gas Key Screws $3.00 Add to Cart AR-15 Firing Pin Retaining Pin $2.50 Add to Cart AR-10 Nickel Boron Bolt Carrier Group $240.00 Add to Cart AR-15 Firing Pin $8.00 Add to Cart AR-15/M16 Extractor Spring $2.00 Add to Cart AR-15 Extractor Buffer $2.00 Nothing much to say except its mil-spec everything and has a great reputation. The Massad Ayoob Group (MAG) Qual is The slightly longer and heavier bolt carrier group has an additional lug at the rear of the bolt carrier group. It is so strong that it is virtually scratch proof. Full auto bolt carriers are essential if you run a fostech echo trigger. The weight saving is great if you're trying to tune the rifle, but it does require tuning. If you ask most people online whats their go-to BCGthe vast majority is going to be BCMs M16 BCG. The PVD coating by Ionbond provides a very low coefficient of friction while providing a unique look and increased reliability. We haven't used one yet but there has been very negative feedback we've heard. For the traditionalist, a phosphate BCG has a texture that just feels right. Wilson Combat DPMS LR-308 Complete Bolt Carrier Gr. I had to go through several different BCGs along with several different manufacturers to find one that cycled correctly in my 45 Raptor. The first lesson I've learned is that - apparently - a rifle is never really finished. Spikes Tactical - M16 5.56 Nickel Boron Bolt Carrier Group. You could have just said Toolcraft, the company that actually manufactures 3/4 of the items you listed. Total weight is 7.87 oz which isnt that much less than the other steel-cut lightweightsbut I like having the complete full-auto form factor. Semi-auto versions used to be significantly cheaper than FA versions, but now the difference isnt as drastic. And is easier to clean. Category suggestion. FailZero. I soaked up as much information as I could online, at competitions, and from tinkering in my workshop. I kept scrolling, looking for the Lewis. Nickel Boron tends to have more shine especially compared to matte chrome. I believe 9310 steel is stronger than C158. And priced at a nice price point between the BCM and Brownells. As someone who's tactically thrifty, I've only used Toolcraft BCGs in my builds(*), and have never had a problem. The Brownells M16 5.56 Complete Bolt Carrier Group is an affordable option that is built and tested to provide flawless operation in any AR-15 or M16. Sale! And theres their Titanium BCG for 5.56/.300 BLK. ETC.. Give me that Sharp's all day long. The LMT BCG is the best on the market. They take take and take but this arbitrary law states one penis per tounged mouth.. so one of the better thinkers decided to remove his tounge per the statue citing one cock per tounged mouth. then went out and stuffed a whole YMCA boys club in his mouth and see where he ended? Our Low Price $314.74 Your Security is Our Priority Rough finish that requires more lubricant to run smoothly, Bravo Company (BCM) Bolt Carrier Group (Brownells). My current go-to for competition shooting is the RCA BCG but costs a pretty penny since the carrier is Titanium. * One is actually a BA BCG, but it's really a re-branded Aero BCG, which in this particular case is really a Toolcraft BCG. It has a 9310 bolt but that is the standard for lightweight builds. A lightweight BCG is designed for a tuned rifle and a builder whos willing to toss an adjustable gas block on and really tune the gun system. We'll only use the information provided according to our privacy policy. At that point it's a Nickel Boron (Silver) vs Titanium Nitride (Gold) discussion and that's a discussion for another day! AR Uppers & Lowers, Rifle Accessories, Mil-Spec Parts | Aero Precision Learn more at. If you look closely youll see that the Titanium carrier is black (DLC: diamond-like coating) while the bolt is silver (nickel boron). Heres a BCG that has a trick up its sleeve. Save a little with their Nitridebut might as well go big or go home. Go to NICKEL BORON NICKEL BORON. Nickel +1. Primary Weapons Systems DI BCG should be #1, followed by POF, BCM #3. Since the typical AR platform uses a direct gas impingement design, the bolt group is in contact with carbon-laden gas with every shot. O.D. It weighs in a little lighter than the Faxon at 8.2 ounces probably due to the one additional cut. The BATFE now needs to suckle up to a penis that they can all share like good gobblers of knob. From my perspective, however, 9310 is an excellent option and is objectively stronger than 8620 and Carpenter 158 steel. AR15 Bolt Carrier Groups White Label's parent company, DRG Manufacturing produces our M16 BCG which is trusted by seasoned shooters and depended on by experienced builders. Here are some of the important bits: See that high pressure tested and magnetic particle inspected above? I don't know who told you that but that is not it. ACME has taken their line of precision AR components and added a Nickel Boron coating to provide increased lubricity and much greater wear . There is no best bcg.Buy one with a great reputation,for me thats Colt.I have Lmt,Psa,Lwrc they all work but Colt is inspected,tested and in spec.THE MOST TESTED. AR-15 Bolt Carrier Group Nickel Boron Finish While Supplies Last $189.99 Add to cart Review financing options with Overview Key Features Lifetime Warranty All RISE products are covered Easy Returns 30-day hassle free returns Made in America Our products are made in Oklahoma Reviews ( 1) Questions ( 1) C 08/15/2022 Chad Myers Facts^ Had never heard of them. Notify me of follow-up comments by email. (, We noticed that you have previously logged in with your, Check what do you get by creating an account, Bookmark and compare your favorite firearms, 13 Best AR-15 Bolt Carrier Groups (BCG) [Hands-On], Low-mass or lightweight bolt carrier groups are relatively new on the market. 6 Reviews. An adjustable gas block lets you tune the gas so that less force is put into the BCG, stacked on top of less mass coming back at you and you have a reduced recoil impulse that is also not snappy! Learn all the important stuff about handgunswith none of the attitude. But with one of Cryptic Coating BCGs you dont have to run them dripping wet which is a definite plus when running suppressed. Shop our vast selection and save! Shout out to Voodoo Innovations. This article was a great read if you're a newbie unfortunately this article forgot to actually mention some of the best BCG's on the market. Add to Cart. johhny B and his boys standing on the corner sucking that corporate dick again. LANTAC 223/5.56 E-BCG Full Auto Style Bolt Carrier Group - Nickel Boron. . Though, this is a relatively new phenomenon and some people prefer the tried-and-true 8620 and Carpenter 158 combination. Currently Im using BCM, F-1 Firearms, Cryptic Coatings, Lantac, JP Rifles and a few others. It also offers unmatched lubricity. Fabulous company and pricing too. This is where you can go stupid cheap on buildsthat still work reliably (PSA 3 AR-15s Review). I'm not affiliated with any of these brands, just things I've learned while building. $254.99 $184.99 Sale. I would have liked to see mention of enhanced bolt carrier groups like the lantac or radian that have different dimensions and can help improve accuracy. I own a few from cryptic Coatings, Radian, and toolcraft. I'd like to purchase a quality bolt carrier without a bolt. You may want to look into Barnes Precision Machine next time. To enter the lightweight BCG gamestart with the Brownells Steel Lightweight. Thanks Mike, I've actually never heard of them! All ACME BCG parts are of the highest quality and 100% made in America. Posted: 8/8/2017 3:54:01 PM EDT. Or am I stuck with replacing the entire BCG to get an M16 bolt carrier? Titanium doesn't offer as much over steel in this case as one might think. Combine this with the fact that a titanium BCG is very expensive and it's hard to call it the "best". We only email about once per week and we do our best to make sure they're worth your while. Sale Price: $169.95 . Just asking since I'm enjoying learning about all of the fun you can have with the adult lego set! Chrome is a timeless classic and you really don't need a reason to choose it. Rated 5.00 out of 5 $ 125.00 $ 114.99 $ 125.00 $ 114.99 Add to cart Quick View. Nickle-Boron +1. If it doesnt say in the descriptionit probably is only batch tested. I got an LMT BCG in my main AR that hasnt had an issue yet and I have a lightweight VDI BCG that has their Lifecoat coating and the gas key is actually integrated into the BCG so there are no screws that can loosen or need to be staked. which style should i get black nitride or nickel boron? WMD Guns Nickel Boron X Bolt Carrier Group Usually Ships in 24 Hours MSRP: $175.00 . I have ADM,AAC,PSApremium,and Colt bcgs.I firmly believe that tha Colt bcg is the best of the milspec bcgs.Until I see proof of long term high round count reliability of the boutique bcgs Im sticking with Colt.Bcm and the filthy 14 have shown reliability after many thousands of rounds. The Sharps 308 Balanced Bolt Carrier Group Complete has the same innovative design as the Sharps 5.56 Balanced Bolt Carrier Group. The Sharps passed with flying colors and the cleanup, even though it was filthy, was a snap. If I want to add a little color or bling to a rifle then I remember the song "Silver and Gold" from the Rudolph The Red Nosed Reindeer movie. You can check that review out in Best AR-15 Muzzle Brakes. For specific comparisons of black finishes (Phosphate vs Nitride vs DLC ) see here The Best Black BCG Finish - Phosphate vs Nitride vs DLC. Is a 9310 steel BCG better steel than a 8620 steel BCG? Mass that should help with reliability. Try contacting E2 Armory - ask for Kaylee. Quick view. 5.56 Bolt Spikes HPT/MPI Bolt Assembly - Phosphate $ 89.95. One of my favorite uppers and full rifle manufacturers is Aero Precision (review of their M4E1 5.56 upper). Buy PSA m16 full auto nickel boron bolt carrier group: GunBroker is the largest seller of AR15 Parts Gun Parts All: 973044689. . The link hereand below will auto-add it. I am interested in a full auto BCG. This beautiful chrome BCG is no exception. Properly built, no corners cut. I have several spare bolts and don't need an extra. See our review here: For a more detailed look at Nickel Boron see our blog post: Also see our review of the Toolcraft Nickel Boron BCG here: It's a difficult finish to apply and as a result it is one of the more expensive finishes. Why do regular bolt carrier groups still exist? Man it sucks to see how much the prices have gone up since this article was posted just a few months ago. Click for Details. It must properly contain the high chamber pressures of the 223/556 . Above: Toolcraft BCG with Manganese Phosphate finish. Select what level shooter you are! : Some of the products on this website can expose you to chemicals including lead, which is known by the State of California to cause cancer and birth defects or other reproductive harm. Main thing is that it looks great and is performing great so far too. 458 Socom / 450 Bushmaster Ar15 BCG Bolt Carrier Group - Nickel $ 288.54 $ 179.00-24%. The 308 Relia-Bolt is made of robust 9310 nickel-chrome-moly alloy steel. All bolts are fully MPI tested to ensure the material is sound and without defects. I do like them in terms of increased lubricity and ease of cleanup. Above: AR-15 BCGs with Nickel Boron finish by Fail Zero (Top) and Toolcraft (Bottom). My pick if you want to go with the best-known name in the NiB BCG game. Normally if you want to control the gas going back into your AR-15 youll need to pick up and install an adjustable gas block. It is a surface treatment that unlike coatings will never chip or flake off. Please view details for more information. With an ultra-low co-efficient of friction, the Nickel Boron Bolt Carrier Group offers users a high resistance to wear and tear as well as corrosion resistance. Full mil-spec everything. What kind of BCG do you run? On the topic of recoil, I get the idea of 'less mass moving might = less felt recoil', but what about less mass in the BCG to absorb the recoil? A little expensive but my AR's run so smooth!! In Stock. I just purchased a nitride (sometimes referred to as Melonite) finished BCG. I can attest to the cryptic coatings as they are by far the best. Shooting 60 rds suppressed with a Nickel Boron carrier then a Chrome carrier. Farkosh, I am with you on this. Plus the silver color pops out in your upper receiver. It comes in at 7.9 ounces and is indistinguishable from their regular Nitride version except when you pick it up. Machined from 8620 Tool Steel (Carrier) and 158 Carpenter Steel (Bolt) Shrouded firing pin. Free shipping on orders of $199+ |Use Code: SITESHIP | Restrictions apply, Offer ends 3/5/2023. Add to Wish List Add . Because nitrided bolt carrier groups do not require chrome lining of the gas key or inner areas of the bolt carrier, manufacturing costs are reduced. What about AR-15s by Geissele? Since the bolt carrier group is shot backward towards the shooter the weight of it affects recoil. QPQ Black . Change one and you have to adjust the rest. Click below for a FREE LESSON! That Nickel Boron finish is MIL-SPEC on some Army mortar tube components. Let me remind you that a quality Ar will run very dirty as long as it's wet. Some people like the rough phosphate finish for its tendency to hold oil better than other finishes. But not all the time. Blem PVD Rainbow m16 bcg Chameleon bolt carrier group $ 159.99 $ 119.99-24%. Rifleman Q & A, Nickel boron (NiB) bolt carrier groups, NiB-coated AR-15 BCG Latest More The Model Of 1903 Springfield: A Collector's Perspective The "U.S. Rifle, Caliber .30, Model of. The Brownells M16 5.56 Complete Bolt Carrier Group features a bolt fabricated from 9310 steel th. My WMD NiB BCG has been chugging along in my AR pistol for a few thousand roundsand Ive only needed to wipe it down with some cleaner and microfiber cloth. Using our fully automated robotically, White Label Armory's in-house machined AR15 billet upper receivers are the perfect complement to our, The AR15 Ambidextrous charging handle made by Brace Built begins with the design, program, machining. They might will get you the part that you need. We also have a whole guide just for choosing a lightweight bolt carrier group,so be sure to check that out if you want to know more. FailZero EXO Nickel Boron M16 / M4 5.56 Bolt Carrier Group Ive run into more semi-experienced shooters than I can count who had no idea, or only a vague idea, what headspace is, and had never checked it on any of their bolts/barrels/rifles. Aero Precision Nickel Boron BCG (SpiceTac). SpiceTac | AR-15 Parts. You, personally wont notice the difference between performance of either steel. No joke , its crazy right now , hard enough to even find anything in stock at that. Standardizing military equipment dates back centuries. Mil-Spec is a bit of a buzzword in the AR community. For these reasons, it is a very popular AR-15 BCG finish. An awesome AR-15 needs a great bolt carrier group (BCG). Nickel Boron is easy to find today while Chrome is hard to find and generally more expensive. , The latest and greatest Ruger 22LR pistol is here! TSG PVD Coated Satin Rose Bolt Carrier Group With Black Nitride Bolt Head (0) $144.00 On sale: $139.99 Sale. Blem PVD Rainbow M16 BCG Chameleon Bolt Carrier Group - $113.99 w/code "NEW5OFF" $113.99. With that VDI BCG, it is one less worry. Thanks for sharing. And the BCG that comes with their upper has always gone bang through many thousands of rounds. If you go chrome it will probably be for the color and the uniqueness of the finish. I bought a LH bolt carrier group from Stag with their Nickel Boron finish. We hate SPAM and promise to keep your email address safe. Dismiss. We only sell the best bolt carrier group, because we understand the crucial role it plays in the function of your AR-15. With nothing more than an initial lube, I ran this bolt carrier suppressed at breakneck speeds for just over 1,200 rounds the last 500 or so were steel-cased. In Stock. Normally a low mass BCG is combined with an adjustable gas block, less mass means less force is needed to move it. Expensive especially since you will probably have to send yours in to be refinished. I am trying to do some research between the two and can't really come up with a PROs and CONs. I don't mind paying more for more performance, but I don't like to waste my money on gimmicks either. The Brownells M16 5.56 Complete Bolt Carrier Group features a bolt fabricated from 9310 steel that includes a heat-treated and shot-peened finish. Above: Colt BCG refinished with matte chrome finish and nickel boron gas key. Of a given product or application of a feature. Shell be able to help you out. purchase helps support my work in bringing you more awesome gun and gear articles. In Stock. I was surprised they weren't included too. are known for less felt recoil, so why would that not translate to the AR platform when talking about the BCG mass? . Please email johnd@spikestactical.com or call 407.928.2666 to acquire a Return Merchandise Authorization Number (RMA.) If it is and you want to spend the money and you like the color, well then it just might be a Nickel Boron kind of a day for you! The added mass of the BCG along with its shrouded firing pin takes away the worry of weapons failure. M16 Bolt Carrier Group 5.56 - Chameleon PVD . Is this the Young Manufacturing that doesn't know how to stake their gas keys? Features. Lantac is very high quality, tough as hell, and highly sought after. Been throw 4 barrels, but the BCG looks near new. GUARANTEED. If you are following the current fad of super lightweight AR-15s you want to trim weight basically everywhere. Black Nitride finished BCGs often have an attractive deep black finish. Its pretty cool to see they are still around innovating products like their Xtreme Performance Bolt Carrier Group. This BCG is a giant leap in the area of durability and reliability. Nickel-Boron +12. We take this Ruger Mark IV Tactical f Aren't they the OEM for some of these Mfgrs? The carrier itself is a very low wear part, the only part that really takes any wear is the cam path itself and that isn't enough to become a problem very often. There Hmmmseems you left out an industry leader who actually makes BCGs and not rebrand someone else's. An aluminum carrier rubbing an aluminum receiver led to the carriers being used up in a few thousand rounds. Check JP Enterprise but I'm thinking colt bcg have a proprietary cut to them?? Looks great under our PREMIUM Handguards now Buy 1, Get 1 FREE! Easiest to clean, best customer service, and no, I'm in no way affiliated with them. Odin works have been perfect in one of my grendels. And has worked out great in my Faxon builds (Faxon Barrel Review). This product group features an AR-15 Nickel Boron Bolt Carrier Group ( 5.56/.223/300AAC ) combined with an ambidextrous charging handle. Live Chat Live Chat. The AR15 use the lube not only as lubricant but also captures particles. . Every time you pull the trigger on your rifle, the bolt carrier group goes to work; this is why it's critical to have a solid AR15 BCG in your rifle. Firearms instructor John Farnam has NP3 applied to not only the BCG but also the inside of the upper and lower receivers of his custom FSM4 AR15s. Main lessonget a full-auto weighted BCG if reliability is a concern. All Colt makes these days are the extractors, The pony is a mere shadow of once greatness.. Are the Phosphate bolts stronger than both NiB & TiN? This clown not mentioning it, and then listing 10 absolute pieces of trash is embarrassing for a tactical website. It has an attractive gray graphite-like appearance. Bolt lugs are chamfered 45 degrees to ensure reliable action for even the highest pressure hand loads and fast lightweight actions. The PVD coating by Ionbond provides a very low coefficient of friction while providing a unique look and increased reliability. Out of stock. APF Armory Bolt Carrier Group AR-15 223 Remington, 5.56x45mm Nickel Boron; APF Armory Bolt Carrier Group AR-15 223 Remington, 5.56x45mm Nickel Boron Shop All Featured Ammunition Featured Reloading Supplies Featured Gun Parts Featured . I have put them in all of my AR platforms in the past 2 years. QPQ +1. You can't have a bunch of non spec parts and expect everything to work together properly. Toolcraft is an OEM provider of BCGs to AR15 manufacturers. It is also smooth and slick which makes for smooth operation and easier cleaning. Then try again. When that build is complete be sure to shop for ammo here:Buy Ammo Online. That would be a more interesting, informative, and transparent story on BCGs. Above: Toolcraft DLC BCG installed with black anodized Aero Precision upper, lower and M-LOK handguards. I also agree with a lot of others here that cryptic coatings should be considered, they are the slickest bcgs I've ever used with the lowest friction on the market. Smooth cycling and is easy-to-clean by simply wiping it down. Quantity: We currently have 14 available. Let's look at some of the best! Phosphate +3. Meets milspec requirements, but at a much higher level of quality. Is that little bit of extra performance important to you? Cryptic is the best Ive ever used as well. It is an electroless nickel-based finish for steel, stainless steel and aluminum alloys that co-deposits sub-micron particles of PTFE (polytetrafluoroethylene), otherwise known as Teflon, with electroless nickel. We're not a huge corporation that values the bottom line more than their customers and we're not a one-man band selling AR15 parts out of a garage, we're big enough to compete and small enough that each customer matters. Faxon Firearms Gen 2 9mm PCC Blowback Full-Mass Bolt Carrier Group - Glock & Colt Compatible | Nitride . It comes in at a much lighter 8.5 ounces (compared to a full auto 11.6 ounces). Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring. Custom Deal BCG & Charging Handle Combos Strike Industries Charging Handle with Extended Latch - FDE + Rise Armament Bolt Carrier Group, .223/5.56, Nickel Boron Finish. It also requires less lubricant to work well and is easier to clean. We'll send you the latest guides and training tips geared For views of different finishes see our Toolcraft Gallery. And now with different coatings. We cover the best-in-class bolt carrier groups for mil-spec, low-mass, slick coatings, exotic materials, and more. If you are looking for the perfect AR bolt carrier group for sale, Omaha Outdoors carries the 9mm, AR-10/AR-15 BCG and much more for low online prices! WMD Guns - AR-15 5.56 Nickel Boron Bolt Carrier Groups. From full-auto to lightweight, different coatings, MPI inspections, and more. Subscribe to Pew Pew Tactical's sales and deals email. I just had a meeting talking about how few manufacturers there are for BCG's. In fact, there's a lot of premium, match-grade equipment for AR-15s that are much better quality than mil-spec parts. Were not a huge corporation that values the bottom line more than their customers and were not a one-man band selling AR15 parts out of a garage, were big enough to compete and small enough that each customer matters. This BCG will meet your performance standards and value. It is not only the most complicated component but also the hardest working one as well. It has a dull gray finish darker than chrome and nickel boron. Mil-Spec generally means the rifle is built to pass military specifications. All critical parts are coated with EXO Nickel Boron technology that provides . This tube has been designed to allow ample clearance for the removal of the roller cam pin during maintenance. You do not pay Faxon Bolt Carrier Groups are Superfinished to reduce friction, increase smoothness of operation, and reduce fouling. I AM WITH THE AMERICANS WHO POLICE AND PUNISH THE BATFE THIS IS OUR ONLY CONCERN. It doesn't mean something is made with the best possible material or most modern fabrication methods. Also known as Melonite, Salt Bath Nitride or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. It also has high corrosion resistance as well as a natural lubricity. Is any of this sounding like a worthwhile version of the truth? Better than any "mil-spec" BCG because of its gas porting. Understanding the AR-15 Bolt Carrier Group what makes them better than Colt,Bcm because they might be easier to clean? 5.56 Bolt Carrier Group and Charging Handle. It has the lubricity of the NiB, it is cheaper than NiB and it cleans up every bit as easy. These two super hard finishes are both easy to clean workhorses that will take the punishment and come back for more. Mil-spec doesnt mean greatest ever, or worst, its just in spec to a military contract. Nickel Boron is an advanced metal finish that offers high resistance to wear and corrosion as well as having an ultra low co-efficient of friction. Celebrate Our New Site by Winning our $12,000 Gun Room Giveaway | Enter Here, Suggestion So once again we get a list of someones opinion on what they think are the best BCG, ask 1000 different people and theyll probably give you a 1000 different lists. The primary advantage of this is to reduce recoil.