Each Weaver base is machined to the tightest tolerances for a custom fit. They are 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. 1 3/4".

Fits:
Anschutz 1568 (front)
Browning Mauser action (front)
Browning BBR long and short action (front)
CIL 950, 950-C and 972-C (front)
Colt 57 (front)
Cooey 71 (front)
Enfield receiver cut down (front)
H&R 300, 301, 330 and 370 made before 1973 (front)
H&R 301 long action made after 1973 (front)
Herters J9 (front)
High-Standard High Power (front)
Interarms Viscount (front)
Marlin 455 and MR7 (front)
Mauser receiver ring 1.410" 98F (front)
Marlin receiver ring 1.300" Swedish 96 (front)
Mauser Bauer 3000 and 4000 (front)
Musgrave Mark I-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 512 (front)
Savage 516 short action rifle (front)
Savage Striker pistol (front)
Savage 110 E and S, 111, 112R, V and FV, 116FSSLA (front)
Savage 10 shotgun made before 2003 (front)
Savage 110FP, 10FP, 112FV-BV and 12FB-BU with AccuTrigger (front or rear)
Savage 10 muzzleloader (front)
Shultz and Larsen (front)
Sears 50, 51 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 action (front)
Winchester 52 with same hole spacing (front)
Winchester 54 and early model 70 with serial number below 66,350 (front)
Winchester 70 LA with same hole spacing (front)
Winchester 300 Mag (front)
Winchester 70 LA with different hole spacing and 70 Super Express (front)
Winchester 670 and 770 (front)

Includes custom-hardened fastening screws for mounting.