Each barrel comes complete with a headspaced barrel extension. COMMON FEATURES & SPECS MATERIAL: Stainless Steel 416R RIFLING: Single Point Cut Rifling MUZZLE: 5/8-24 Tapered Muzzle FINISH: Bead Blasted Matte Finish 22 6.5 Creedmoor WEIGHT: 3 lb 9 oz CONTOUR: Medium Palma RIFLING: 5R, 1:7 Twist * Weights includes barrel extension, extension jam nut What s In The Box? Barrel Change Manual Tools, Barrel Nut, and Cherry Bomb not included.