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. T
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The Weaver® Top-Mount 1-Piece Scope Base is a rugged, precision base for use with Weaver-style scope rings that fit most popular gun models. Constructed of machined aluminum for a combination that'sightweight and durable. Custom-hardened fasteni
The Weaver® Top-Mount 1-Piece Scope Base is a rugged, precision base for use with Weaver-style scope rings that fit most popular gun models. Constructed of machined aluminum for a combination that'sightweight and durable. Custom-hardened fasteni
The Weaver® Top-Mount 1-Piece Scope Base is a rugged, precision base for use with Weaver-style scope rings that fit most popular gun models. Constructed of machined aluminum for a combination that'sightweight and durable. Custom-hardened fasteni