CMMG 22BA64D Auto Sear Trip Kit 22ARC 22 LR Stainless

The CMMG 22BA64D Auto Sear Trip Kit is a factory replacement parts kit for CMMG's 22ARC rimfire conversion. The kit includes the two small internal components that ride inside the 22ARC bolt carrier group: the auto sear trip and the anti-bounce weight, which together keep the BCG cycling reliably on an AR-platform host.

Both pieces are constructed of stainless steel with a natural silver finish for the durability needed in a reciprocating BCG. Designed as direct-fit factory replacements, they install in place of the worn originals without needing to replace the complete bolt carrier assembly, making this a cost-effective way to refresh a tired 22ARC BCG. The Auto Sear Trip Kit fits the AR-15 platform equipped with a CMMG 22ARC upper chambered in 22 LR and weighs just 0.78 oz as a compact drop-in service part.