Les Baer's Monolith features an integral rail machined directly into the dust cover, creating a seamless single-piece lower. Built on the full-size Premier platform with all of Baer's match-grade components, the Monolith is a tactical full-size 1911 suited for light mounting. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 8 Year introduced: 2003, USA Weight: 41.5 oz Overall length: 8.75" Status: Active Intended use: Tactical, Home Defense, Competition