No. 45S base

Fits:
Browning Mauser action
CIL 972-C
Colt 57
H&R 300, 301, 330 & 370 made before 1973
Herters J9
Interarms Viscount shimming required
Marlin 455
Mauser w/receiver ring 1.410"
Modern Muzzleloading LK-93, Wolverine & Legend (front or rear)
Modern Muzzleloading Disc & American round receiver (front or rear)
Musgrave Mark III & IV
Parker-Hale 1000, 1000C, 1100, 1200 & 1700
Sears 50 & 51
Voere 2150, 2165/1-4 Mauser action
Weatherby FN Mauser actions

Includes custom-hardened fastening screws for mounting

Mauser w/round receiver requires shimming & rear base modifications