The Weaver® Top-Mount Extension Scope Base #40A is machined from aluminum to fit Weaver-style cross-bolt rings tightly. The square-cut notch matches precisely with the cross-bolt to fight the effects of recoil from changing the rifle's zero. The Top-Mount Extension Scope Base #40A is compatible with receivers of the following firearms: BSA Monarch medium action and long action; Churchill Highlander; Colt Sauer; Herters U9; Howa; Mossberg 1500, and 1700, Remington 700, 78, 40X, 721, and 725 long actions; Remington 700, 78, 40X, 722, and 725 short actions; Ruger M-77 round top; Rossi/Stoeger round receiver; Sauer 200; Smith & Wesson 1500, 1600, and 1700; Shilen round receiver, and Weatherby Mark V, Mark V Deluxe, and Vanguard.
- Machined aluminum construction
- Fit Weaver-style, cross-bolt rings
- Compatible with many round receivers
Web ID: 19694