Nobody makes bases to fit as many guns as Weaver. Yet each base is machined to tight tolerances for a custom fit. They're designed to fight the effects of recoil with a square cut notch that precisely mates to the sturdy cross bolt in every Weaver Detachable Ring. Custom hardened fastening screws come with every Weaver base.

2 of these are required to mount a scope

Anschutz 1568, front
Beretta Mato rifle, front
Browning Mauser actions, front
Browning BBR long and short action, front
CIL 950, 950-C & 972-C, front
Colt 57, front
Cooey 71, front
Enfield receiver cut down, front
H&R 300 and 301 long action made after 1973, front
Herters J9, frontHigh Standard High Power, front
Interarms Viscount, front
Marlin 455 and MR7, front
Mauser 98FN with 1.410" receiver ring, front
Mauser Swedish 96 with 1.300" receiver ring, front
Mauser Bauer 3000 and 4000, front
Musgrave Mark I, II, III and IV, front
Navy Arms Country Boy muzzleloader, front or rear
Parker-Hale 1000, 1000C, 1100, 1200 and 1700, front
Savage 10, 12, 16, 510 and 512SA, front
Savage Striker pistol, front
Savage 110, 111, 112, 116FSS LA, front
Savage 210 shotguns made before 2003, front
Savage 10 muzzleloader, front
Savage 110FP, 10FP, 112FV-BV, 12FP-BV with AccuTrigger, front or rear
Schultz & Larsen, front
Sears 50, 51, 51L and 53, front
S&W Mauser actions with small receiver ring, front
Stevens 110E, front
Voere 2150, 2165/1-4 Mauser action, front
Weatherby FN Mauser actions, front
Winchester Ranger 52 with same hole spacing, front or rear
Winchester 54 and early model 70 with serial number 66,350 and lower
Winchester 70 WSSM
Winchester 70 long action with same hole spacing, front
Winchester 70 long action with different hole spacing, front
Winchester 70 Super Express, front
Winchester 70 Coyote SA, front
Winchester 670 and 770, front