NBS Bolt Carriers Gun Parts
(19 deals total)

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Filter NBS Bolt Carriers Gun Parts

1 week ago
Description The NBS .223/5.56 Black Nitride Bolt Carrier Group was designed with strength in mind. Starting with a 9310 Steel Bolt, which is aircraft-grade material, this bolt has a high core strength rating, a high fatigue strength, and a high hardenability rating. 9310 steel, when treated properly, is about 7% better than Carpenter 158 steel, so you know that you will have a dependable BCG, when you drop this into your rifle.
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3 weeks ago
The NBS M16 bolt carrier group is the perfect BCG for your next build and is compatible with any AR15 build. The PVD coating by Ionbond provides a very low coefficient of friction while providing a unique look and increased reliability. Properly built, no corners cut. MPN 10288 Bolt Material 9310 Steel Cartridge Compatibility .223/5.56 NATO/.300 BLK Finish Chameleon PVD Carrier Profile M16 Magnetic Particle Inspected Magnetic Partical Inspected Platform AR-15 Bolt Finish Salt Bath Nitride
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1 month ago
Description The NBS Lightweight 5.56/.223 Nitride Bolt Carrier Group for the AR-15 platform is precision made to MIL-SPEC standards using the highest quality materials and machining available. By reducing the mass of the BCG, felt recoil is diminished, allowing you to stay on target for more accurate shooting. The NBS Lightweight BCG is perfect for competition/3-gun applications when paired with an adjustable gas block and a lighter buffer!
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3 months ago
Description If you are looking to build a 9mm Rifle, then this NBS 9MM BCG is exactly what you will need to ensure smooth cycling. Our bolts come ramped and in a smooth black nitride finish to ensure longevity.The NBS 9mm BCG is designed to work with Glock style AR9’s. These are also tungsten weighted to proper spec for reliable and safe use. *Incompatibilities exist with Colt magwell adapters and QC10 lowers* *Endomag 9mm inserts may require minor modification per Mean Arms break-in procedure for ideal function* - Machined from 8620 Steel - Titanium Nitride Finish -
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3 months ago
Description Here at AR15Discounts.com we work with a wide variety of machine shops and barrel manufacturers. When we come across a barrel maker we like, we will often decide to private label those barrels for resale under the NBS brand. We purchase these barrels in large quantities and then pass the savings on to our customers. Why buy an NBS Brand Barrel: - American Made – Sourced from a variety of Tier 1 Manufacturers here in the United States - Quality Control – All barrels are manufactured under ISO-9001 or better quality standards
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4 months ago , by Dealer
The NBS .223/5.56 Black Nitride Bolt Carrier Group was designed with strength in mind. Starting with a 9310 Steel Bolt, which is aircraft-grade material, this bolt has a high core strength rating, a high fatigue strength, and a high hardenability rating. 9310 steel, when treated properly, is about 7% better than Carpenter 158 steel, so you know that you will have a dependable BCG, when you drop this into your rifle.
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4 months ago
Description The NBS AR-15 5.56/.223 Left-Handed BCG is the perfect starting point for our wrong-handed friends. This BCG has one of the best black nitride finishes we have seen, and comes in a mil-spec design with a lifetime warranty. The bolt is made from enhanced 9310 steel while the carrier is made from 8620 tool steel. It is shot-peened and magnetic particle inspected. Included: - Bolt w/ D2 Extractor - Bolt Carrier w/ staked Gas Key - Cam Pin - Firing Pin - Firing Pin Retaining Pin Technical Specs:  - Gas system: Direct Impingement
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4 months ago
NBS Nickel Boron Bolt Carrier Group for .223/5.56/300BLK Carrier M16 style (Auto) Machined from 8620 tool steel Heat treated to mil spec Bolt Machined from 9310 tool steel Heat treated to military specifications Shot Peened MPI (Mag Particle Inspected) Gas Key Machined from 17-4 Stainless Steel Heat treated to mil spec Extractor Machined from S-7 shock resisting tool steel Heat treated to mil spec Shot peened Extractor spring is made of stainless steel music wire Firing Pin Machined from 17-4 stainless steel Heat treated to milspec Specifications Weight: 11.6 oz
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5 months ago
Description NBS Nickel Boron Bolt Carrier Group for .223/5.56/300BLK Carrier - M16 style (Auto) - Machined from 8620 tool steel - Heat treated to mil spec Bolt - Machined from 9310 tool steel - Heat treated to military specifications - Shot Peened - MPI (Mag Particle Inspected) Gas Key - Machined from 17-4 Stainless Steel - Heat treated to mil spec Extractor - Machined from S-7 shock resisting tool steel - Heat treated to mil spec - Shot peened - Extractor spring is made of stainless steel music wire Firing Pin - Machined from 17-4 stainless steel
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5 months ago , by Dealer
NBS Nickel Boron Bolt Carrier Group for .223/5.56/300BLK Carrier M16 style (Auto) Machined from 8620 tool steel Heat treated to mil spec Bolt Machined from 9310 tool steel Heat treated to military specifications Shot Peened MPI (Mag Particle Inspected) Gas Key Machined from 17-4 Stainless Steel Heat treated to mil spec Extractor Machined from S-7 shock resisting tool steel Heat treated to mil spec Shot peened Extractor spring is made of stainless steel music wire Firing Pin Machined from 17-4 stainless steel Heat treated to milspec Specifications Weight: 11.6 oz
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6 months ago
Description The NBS M16 bolt carrier group is the perfect BCG for your next build. Properly built, no corners cut, 100 percent US made. With our lifetime guarantee, you can’t go wrong. M16 / AR15 6.8 SPC & .224 Valkyrie - 8620 M16 style carrier - H&M Black Nitride finish - Properly heat treated - Final grind before plating - 9310 6.8SPC / .224 Valkyrie bolt - Heat treated - Shot peened - H&M Black Nitride finish - MPI - 4140 billet gas key - H&M Black Nitride Finish - Properly seated with Grade 8 fasteners - Properly staked to ensure reliability
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7 months ago
Description A quality upper assembly without cutting corners. This means starting with a top tier mil-spec forged upper receiver, using a steel gas block as opposed to aluminum, quality American Made M-LOK handguards (handguard style may vary) and one of the nicest nitrided A2s you’ll find anywhere. This also means taking the time to ensure that the upper will function reliably. We use Permatex 242 on key components while using mil-spec AEROSHELL 33MS Anti-Seize grease on the properly torqued barrel nut and muzzle device.
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7 months ago , by Dealer
The NBS M16 bolt carrier group is the perfect BCG for your next build and is compatible with any AR15 build. The PVD coating by Ionbond provides a very hard surface that makes for easier cleaning and increases reliability. Properly built, no corners cut. 8620 M16 Style Carrier PVD Coating by Ionbond Heat Treated Final Grind Before Plating 9310 5.56/.223 Bolt Heat Treated Shot Peened Blacknitride+™ by H&M MPI 4140 Billet Gas Key PVD Coating by Ionbond Properly Seated with Grade 8 Fasteners Properly Staked 4140 Cam Pin Blacknitride+™ by H&M S7 Tool Steel Extractor
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7 months ago
Description The NBS Lightweight 5.56/.223 Nickel Boron Bolt Carrier Group for the AR-15 platform is precision made to MIL-SPEC standards using the highest quality materials and machining available. By reducing the mass of the BCG, felt recoil is diminished, allowing you to stay on target for more accurate shooting. The NBS Lightweight BCG is perfect for competition/3-gun applications when paired with an adjustable gas block and a lighter buffer!
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8 months ago
The NBS M16 bolt carrier group is the perfect BCG for your next rifle. 100% US made. M16 / AR15 6.8 SPC & .224 Valkyrie M16 style carrier Black Nitride finish 6.8SPC / .224 Valkyrie bolt Heat treated Shot peened Black Nitride finish MPI billet gas key Black Nitride Finish Properly seated Properly staked Cam Pin nitride treated for wear resistance Billet Machined Extractor Machined from solid 4140 bar stock, heat treated and shot peened Phosphate coated for reliable extraction Extractor insert included O-Ring included 100% USA Made   SKU: M16-BCG-6.8
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10 months ago
Description Made from 9310 Steel which has a high core hardness and high fatigue strength unlike standard Hot/cold rolled 9310 steels. This is a Mil-Spec bolt assembly with enhanced features for those looking to complete a bolt carrier group. This bolt will make sure your gun outshines the competition – Fully Assembled Bolt – Shot Peened – MPI (Magnetic Particle Inspected) – HPT (High Pressure Tested) – Power Spring Kit – Nitride QPQ Treated – Engraved with MPI/9310 Weight 4 oz MPN 6290 SKU: 6290
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11 months ago
Description Right here is a True Mil-Spec BCG. This unit is for builders who prefer tried and true manufacturing and aggressive quality assurance testing over fancy coatings, proprietary profiles and laser engraved logos. Bolt - Machined from Carpenter Technology No. 158 alloy. - Heat treated - Shot peened per ASTM B851/SAE AMS2430S - Individually High Pressure Tested (test fired) - Individually Magnetic Particle Inspected - Manganese Phosphate Finish Extractor - Tool Steel Extractor - Black Nitride Finish - Mil-Spec O-Ring Carrier
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