Weaver 40A-M Top Mount Extension Base, Black Matte

Fits:
Beretta Pintail Slug Gun front & rear
BSA CF2 & Monarch Long Action 7mm, .270 & .30-06 front
Churchill Highlander front
Colt Sauer front & rear
Enfield receiver cut-down like Remington 721 front
Herters U9 round receiver front
Legacy Howa front
Mossberg 100 ATR, 1500 & 1700 front
Raptor Arms front
Remington 700, 78, 40X-L, 721 & 725 Long Action front
Remington 700, 78, 40X-S, 722 & 725 Short Action front
Remington 700 muzzleloader front
SIG Sauer 200 front & rear
Shilen round receiver front & rear
S&W 1500, 1600 & 1700 front
Weatherby Vanguard front
Weatherby Mark V Mag (not .240 mag) front