Sourced from a Tier 1 supplier of the M4A1 carbine, this 5.56mm complete M4 Bolt Assembly is manufactured to the highest of military standards. They are off the same production line as Bolt Assemblies paired with Bolt Carriers found in carbines throughout the entire Department of Defense, these components are both high quality and highly reliable.

Black River Tactical M4A1 Bolt Carrier Group The Black River Tactical Bolt Carrier Group features an M16 profile and is tested to ensure a lifetime of reliability. Bolt: Precision machined from Carpenter Technology No. 158 alloy, Heat treated per mil-spec, Shot peened per ASTM B851/SAE AMS2430S, Vibratory tumbled; Individual high pressure/proof ...

Bolt is marked "MP". Carrier is marked "BRT" with Logo on the top rear side. 100% made in USA to current USGI M4A1 specifications.

Carpenter 158 bolt is Shot Peened, HP tested and MP inspected. Bolt is marked "MP". Includes cam pin with dry film lubricant, CHROME Firing pin and Firing Pin Retaining Pin. 100% made in USA to current USGI M4A1 specifications.

Bolt Carrier Group: Colt Charging Handle: Standard GI, PRI Gas Buster Military Latch Rear Sight: Matech, Knights Armament Front Sight: Colt FSP Optic: Aimpoint CompM2 w/ Wilcox/Aimpoint GI Mount, Aimpoint CompM4/M4s, Trjicon TA01NSN ACOG, Eotech 553/SU-231, Eotech EXPS3-0/SU-231a, Elcan SpecterDR 1-4/SU-230 FDE w/ L3 MRDS/Docter, Eotech G33 ...

Daniel Defense Complete Bolt Carrier Group Assembly, Black - Reliable Performance - 04-013-19032

Home / AR / M16 / M4 BOLT CARRIER GROUP PARTS. AR / M16 / M4 BOLT CARRIER GROUP PARTS. Showing all 15 results. AR-Bolt Carrier & Key Assembly- Military $ 63.00 Add to cart. AR-Bolt Carrier- Military $ 47.00 Read more. AR/M16/M4-Bolt Assembly $ 63.00 Read more. AR/M16/M4-Bolt Carrier Key $ 14.00 Add ...

Black River Tactical M4A1 BCG is a Full Auto Bolt Carrier Group made to current USGI M4A1 specifications. Features: Carpenter 158 bolt is Shot Peened, HP tested and MP inspected. The USGI full auto bolt carrier is Hard Chrome lined inside and Manganese Phosphate coated outside.

100% made in USA to current USGI M4A1 specifications. The USGI full auto bolt carrier is Manganese Phosphate coated outside and Hard Chrome lined inside. The Mil-Spec gas key is chrome lined and secured with properly staked Grade 8 fasteners to …