Models include:
Enfield round receiver; U11 (Front and Rear)
Krag; U11 (Front), U27 (Rear)
Marlin lever action except .22; U11 (Front and Rear)
Marlin 39A round barrel; U20 (Front), U18 (Rear)
Marlin 39 octagon barrel; U37 (Front), U18 (Rear)
Marlin A-1, 50; U18 (Front and Rear)
Mauser with enlarged receiver ring *bolt must be altered; U11 (Front), U39 (Rear)
Montgomery-Ward 488A, 489A (Auto); U18 (Front and Rear)
Mossberg 50, 51M, 151M (Auto); U18 (Front and Rear)
Newton; U27 (Front and Rear)
Remington 12A; U23 (Front), U21 (Rear)
Remington 14, 141; U30 (Front), U29 (Rear)
Remington 25; U23 (Front), U24 (Rear)
Remington 30; U11 (Front and Rear)
Remington 37; U36 (Front), U32 (Rear)
Remington 241; U28 (Front), U30 (Rear)
Remington 721, 722; U14 (Front), U10 (Rear)
Savage 40, 45; U11 (Front and Rear)
Savage 99; U11 (Front), U15 (Rear)
Savage 25, 29 round and octagon barrel; U38 (Front), U11 (Rear)
Savage 219; U18 (Front and Rear)
Sears-Roebuck 103-4; U18 (Front and Rear)
Stevens 417; U18 (Front), U21 (Rear)
Winchester 54, 70; U14 (Front), U10 (Rear)
Winchester late model 70 with threaded holes on top of receiver bridge; U14 (Front), U13. (Rear)
Winchester 03, 63; U23 (Front), U11 (Rear)
Winchester 07; U20 (Front), U30 (Rear)
Winchester 52 Sporter; U33 (Front), U32 (Rear)
Winchester 52 Standard; U34 (Front), U32 (Rear)
Winchester 52 Heavy; U35 (Front), U32 (Rear)
Winchester 52 Bull; U36 (Front), U32 (Rear)
Winchester 61 round barrel; U19 (Front), U11 (Rear)
Winchester 61 octagon barrel; U37 (Front), U11 (Rear)
Winchester 74; U18 (Front and Rear)