Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

Drop-In Assembly With Strength & Durability Features For Dependable Service

Complete, mil-spec assembly with bolt, bolt carrier, and firing pin ready to drop into the rifle or carbine upper of your choice. Features a shot-peened bolt for increased surface strength and durability, and an extractor booster to ensure reliable cycling during rapid semi-auto or full-auto fire. Each assembly is magnetic particle inspection tested to ensure it’s free from imperfections that can lead to premature failures. Properly staked gas key prevents gas leakage that can lead to short stroking. M16-style carrier on the black phosphate model has full-length shroud for tripping auto sear, so this carrier may be installed on full-auto law enforcement and military rifles.


AR-15, Issue:10, Page:010
Big Book Catalog, Issue:68, Page:012

SPECS: Steel, black parkerized finish. Fits mil-spec semi-auto and full-auto AR-15/M16 upper receiver chambered for .223/5.56mm.

5.56MM BOLT CARRIER GROUP COMPLETE
100-004-634WB
Complete Bolt/Carrier Group, M16
100004634Complete Bolt/Carrier Group, M16

Mfr Part: 0401319032

$189.00

In Stock

Cartridge: 5.56 mm NATO

Finish: Matte Black

M16 5.56 BOLT CARRIER GROUP