Weaver Top Mount Base 401S Silver S&W L/K/N Frame

The Weaver Top Mount Base 401S is a one-piece silver aluminum base for mounting a scope to Smith & Wesson and Taurus revolvers. It attaches to the receiver of the gun and is intended for use with Weaver-style detachable scope rings.

The base is machined with a square-cut notch that engages the cross bolt in Weaver detachable rings, which the manufacturer describes as helping resist the effects of recoil. It is listed as factory drilled for Smith & Wesson Models 29, 629, 625, and L, K and N frame revolvers, and for Taurus L, K and N frame revolvers, which the listing notes are like the Smith & Wesson pattern.

Mounting hardware is included with the base.

• Type: Scope Base
• Brand: Weaver Scope Mounts
• Model: Top Mount Base 401S
• Material: Aluminum
• Finish: Silver
• Mount Type: To Receiver
• Fits: Smith & Wesson Models 29, 629, 625, L, K and N frame revolvers (factory drilled); Taurus L, K and N frame revolvers
• Configuration: One-piece base