Armaspec AR-15 Bolt Catch Detent Stainless Steel

The bolt catch detent is the small pin that holds spring tension on the bolt catch in an AR-15 lower. It is also the part most likely to launch off the bench and vanish into the carpet halfway through a build, which is the real reason to keep a spare in the parts bin.

Armaspec cuts this one from stainless, so it will not surface rust in a lower that spends its life in a humid safe. The spring and roll pin come in the package, and the set drops into a standard lower receiver with no fitting and no modification to the surrounding parts.