Inland USGI M1 Carbine Sear Hammer Release - RI marked - with hole - Type 2

M1 Carbine Hammer Release - Type 2 - Inland "R.I." No Hole

Inland USGI M1 Carbine Sear Hammer Release - BI marked - without hole - Type 1

USGI M1 Carbine Rifle - Hammer Release & Spring RIA Rock Island Arsonal

Quality Hardware USGI M1 Carbine Sear Hammer Release - GE-Q - no hole - Type 1

Standard Products M1 Carbine Sear Hammer Release - SW - w/o hole - Type 1

IBM USGI M1 Carbine Sear Hammer Release - GB marked - with hole - Type 2

M1 Carbine Recoil Plate, Marked " W.I. ", Inland, Original USGI, Type 3