HYBRID CHROME Full Auto Bolt Carrier Group BCG for the AR Family of Weapons (AR15, M16, M4)
Carpenter 158 bolt is Shot Peened, HP tested and MP inspected and Phosphate coated.
Extractor is Phosphate coated with GOLD extractor spring assembly.
The USGI full auto bolt carrier is Hard Chromed outside and inside.
The Mil-Spec gas key is full Chrome, secured with heavy splined fasteners (per mil-spec drawing) and properly staked to ensure reliable gas system performance.
Bolt is marked "MP".
Carrier is marked "BRT" with Logo on the ejection port side or top rear, depending on option selected.
100% made in USA to USGI M16 specifications.