Ultimate Arms Gear Pack Of 5 Buffers - Synthetic Wear Reducing Receiver Buffer For AR15 AR-15 AR 15 M4 M16 Rifle Cycling System
Pack of 5 . Tough, high-density synthetic rubber wedge drops into the space behind the takedown pin in the lower receiver to provide tension between the receiver halves and prevent movement for improved accuracy and performace so you shoot tight, consistent groups, reduce mis-feeds, and improve ammo feeding. Can be trimmed to accommodate any variation in upper-to-lower receiver fit. No Modifications required, this is the fastest and simplest accuracy improvement device for your AR.