Brownells AR-15/M16 Takedown Detent Spring

The Brownells AR-15/M16 Takedown Detent Spring is a replacement spring for the takedown pin detent on AR-15 and M16 platform rifles. This small but essential component ensures proper retention and function of the lower receiver's takedown pin. Sold individually, it is an ideal spare part for gunsmiths and builders performing AR-15 lower receiver assembly or maintenance.