A B Arms A*B Pro 5.56mm Bolt Carrier Group – Complete Nickel Boron Assembly

American Built Arms AR-15 Nickel Boron 5.56mm Bolt Carrier Group. Built in the USA to Mil-Spec dimensions, this bolt carrier group is comprised of qualiity components. It featurtes a 9310 steel bolt, 8620 steel bolt carrier, 4130 steel gas key, 4340 steel cam pin, E4140 steel extractor, and an AISI 8740 steel firing pin. This bolt assembly is ready to drop in to your AR-15 style rifle. This high quality component is great for your .223 Remington/5.56x45mm build, or for upgrading your factory components.

A*B Arms A*B Pro 5.56 Bolt Carrier Group is built to Mil-Spec dimensions. The Nickel Boron coated Bolt and Cam Pin needs virtually no lube during use. The Nickel Boron coated Carrier is coated for extra lubricity and the phosphate coated extractor has a surface finish that provides superior extraction during firing. These Bolt Carrier Groups are ready to drop into your rifle. A*B Arms Bolt Carrier Groups are specially made on high end Swiss machinery to have exacting tolerances and surface finish. A*B Arms is known by rifle manufacturers for manufacturing one of the finest quality bolts and extractors available. This has won them contracts with some of the highest quality AR manufacturers in the business. ....

American Built Arms Company PRO 5.56 Bolt Carrier Group (BCG)

The AB Arms PRO Advanced Rifle Bolt Carrier Group BCG is specially made to have exacting tolerances and surface finishes and built to Mil-Spec dimensions. These Bolt Carrier Groups by American Built Arms Company are built of 8620 steel and coated in Nickel Boron with a Nickel Boron coated bore, so you’ll need nearly no lubrication. The extractor of the American Built Arms Co PRO 5.56 BCG is made from aircraft grade E4140 steel, and is coated in manganese phosphate to provide superior extraction during each fire. Drop in ready, this AB Arms NiB Bolt Carrier Group BCG is the perfect addition to any MSR....

Bolt

• 9310 Steel
• Heat treated per Mil-Spec Requirements
• Shot Peened per Mil-Spec Requirements
• MPI Tested Material
• Nickel Boron Coated

Manufacturer: American Built Arms Company

PRODUCT SPECIFICATIONS:

• Brand: American Built Arms Company
• Caliber:.223 Rem,5.56x45mm
• Finish / Color: Nickel
• Firearm Type: Pistol,Rifle
• Material: Steel
• Models Fit: AR-15

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