Rimfire Weaver Style Base Silver Finish by Thompson Center Product Overview offers the Rimfire Weaver Style Base Silver Finish from Thompson Center. The Rimfire Weaver Style Base is constructed of aluminum for excellent strength and light weight. The Rimfire Weaver Style Base is drilled to fit all TC Contender and Encore Rimfire Barrels. This mount is not intended for larger calibers. The Rimfire Weaver Style will accept scope rings with Weaver and Warne or Picatinny rail style clamps. Specifications and Features: Fits TC Contender and Encore Rimfire Barrels Drilled and Ready to Mount Aluminum Construction Weaver Rail