Original A2 Contour For A Custom Build Or Rebarrel Job
Ready-to-install, A2-profile 20" rifle barrel chambered for 5.56mm NATO comes with the barrel nut and extension, triangular handguard cap, and front sight tower installed. Machined from chrome-moly bar stock and magnetic particle inspected afterward to ensure quality, with a chrome-lined bore. Sight tower includes bayonet lug and sling swivel attachment point, ready for your choice of sight post and swivel.
AR-15, Issue:11, Page:020
Big Book Catalog, Issue:70, Page:018
SPECS: 4150 chrome-moly-vanadium carbon steel alloy, manganese phosphate finish, matte black. 20½" (52cm) OAL. .750" O.D. at gas port, .648" O.D. under handguard, .700" O.D. at muzzle. Chambered for 5.56mm NATO. 1-7" rifling twist rate. ½" x 28 tpi muzzle threads.