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Lower Receiver Set Screw and Roll Pin Screw Replacement Set

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This kit contains replacement threaded components that come with Premium 80% Lowers (Fire/Safe Marked Billet) and AR-9 (9MM) 80% Lowers (Billet). These receivers feature upgraded bolt catch and takedown detent fittings. Both fittings are threaded. A 1/16 sized hex key will work for both set screws. 

Replacement Set Includes:

  • 1 x 6/32" Bolt Catch Roll Pin Set Screw
  • 1 x Rear Takedown Detent Set Screw

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