Special "Medium" Contour & 5R/20 Rifling To Improve Accuracy Potential
Button-rifled replacement barrel has a heavier contour in front of the op rod guide than a standard “medium” weight barrel for added rigidity that enhances accuracy potential. Compatible with any receiver built to USGI specs, including Springfield Armory and LRB Arms receivers and is legal for high-power service rifle matches. Barrel features 5R 20 degree rifling, for superior accuracy. Stainless steel model is short-chambered; after installation, use a hand-turned finish reamer to deepen the chamber until correct headspace is reached. Comes with a new-design op rod guide that matches the barrel contour and doesn’t contact the handguard, eliminating a pressure point that can reduce accuracy. Knurled guide seat on barrel. Recommended roll pin is #817-000-072. May require minor stock inletting. Requires gunsmith installation.
Big Book Catalog, Issue:67, Page:170
New Product Supplement, Issue:641, Page:007
SPECS: 410 stainless steel, natural finish. 22" (55.8cm) long, 13⁄32" (2.78cm) largest outside diameter. 3 lbs., 4 oz. (1.47kg) wt. Rifling: 4-groove, 1-11" twist rate. Includes 4140 carbon steel op rod guide. Fits USGI-spec receivers, including Springfield Armory and LRB Arms. Stainless model requires final chambering and gunsmith installation.