The LR-308B added a free-float bull barrel and a flat-top upper receiver to the standard LR-308 platform. The B designation indicated the heavier contour stainless barrel, optimized for bench rest accuracy in a .308 AR package. Type: Rifle Action: Semi-Automatic Caliber: .308 Win Capacity: 20 Year introduced: 2000, United States Weight: 160 oz Overall length: 36" Status: Discontinued Intended use: Target Shooting, Hunting