Black Dog Machine Bolt Saver AR-15 Receiver Dust Shield

Molded polymer cover fits in the underside of a disassembled AR-15 .22 conversion upper receiver to prevent the bolt from falling out and keep dirt and debris out of internal components. Slide over front and rear take-down pins, then secure it with the two cotter-style push pins. Will also work with standard disassembled AR15 uppers.