The AR-15 Takedown Pin Detent is an essential small component for your AR-15 rifle assembly specifically designed to work with takedown and pivot pins.AR-15 Takedown/Pivot Pin DetentCompatible with standard AR-15 lower receiversEssential component for proper pin retentionPrecision manufactured for reliable functionUPC: 785939517415This detent ensures proper retention and function of your AR-15's takedown and pivot pins making it crucial for field stripping maintenance and reliable operation of your rifle.