Shaw Barrels Bull Barrel Features The Shaw Barrels Bull Barrel is machined from 4140 chrome moly steel with a .920 bull diameter profile adding mass along the length of the barrel to resist heat-induced stringing during rapid strings of fire. The Bentz style match chamber is cut for tighter headspace tolerances than a factory chamber helping rimfire ammunition seat more consistently for improved accuracy. A 1:16 twist rate is matched to standard .22 LR bullet weights stabilizing the round through its full flight path to the target. The matte blued finish protects the steel from corrosion while keeping a low-glare understated look on the completed rifle. Built as a direct replacement for the Ruger 10/22 this barrel drops into the factory takedown system without requiring other receiver modifications. The muzzle is threaded 1/2x28 with a .400 thread length opening the rifle up to suppressors compensators and other muzzle devices that the factory barrel cannot accept. At 16.5 in length and roughly 2.9 lb the barrel keeps the rifle s balance manageable while meeting the minimum legal length for a rimfire rifle barrel. Shaw Barrels built this bull barrel for 10/22 owners chasing tighter groups and more options at the muzzle than their stock setup allows. Shaw Barrels Bull Barrel Specifications Manufacturer: Shaw Barrels Model: Bull Barrel Caliber: .22 LR Compatible Hosts: Ruger 10/22 Barrel Length: 16.5 Barrel Description: Bull Barrel Material: 4140 Chrome Moly Steel Barrel Finish: Matte Blued Diameter: .920 Twist Rate: 1:16 Thread Pattern: 1/2x28 Weight: 2.9 lbs Available At: GrabAGun