Grand Slam Scope Base Features The Weaver 1-Piece Grand Slam Steel Dovetail Base allows for a secure mounting system with your scope. The strong build of this system makes for maximum durability. Being constructed from solid metal and formed into one piece also makes for a secure placement. The unique selection of Weaver bases allows for a custom fit with your weapon with many variations. Whether you need a base for your hunt in the field competition shoot or casual day at the range stability is key. Grand Slam Scope Base Specifications Weaver Grand Slam 1-Piece Steel Dovetail Scope Base Springfield 03A Black