Carbon Steel Barrels Available in Three Lengths
One of these durable, 4140 heat-treated carbon steel barrels is a critical component in converting an AR-15 into a fast-shooting, low-recoil carbine or pistol chambered in 9x19mm Luger. One-piece, fully machined barrel extension provides for reliable feeding/chambering. 1-14" twist 6-groove rifling is optimized for the 9x19mm round for optimal performance. Available in 16", 10.5", and 5.5" lengths. All NFA rules apply.
AR-15, Issue:09, Page:100
Big Book Catalog, Issue:67, Page:019
SPECS: 4140 steel, heat-treated to Rc 25-32, matte black finish. .750" (1.9cm) O.D. at gas block. 1-14" twist rifling. ½"-36 muzzle threads.