Shown with optional electronic sight, light, and pre-ban 20 round magazine Springfield Armory SOCOM rifles are compact, powerful, close-quarter battle rifles. But being chambered for 7.62mm NATO. They still pack plenty of punch to reach out and make that crucial shot at a distance. They feature 16-inch barrels (the shortest allowed for a civilian-owned rifle) made possible by a re-tuned gas system. A proprietary, high-efficiency muzzle brake virtually eliminates muzzle rise, enabling you to stay on target for faster, more accurate follow-up shots. The new Cluster Rail System of the SOCOM II further enhances its versatility by accommodating virtually any optic, light or other accessory designed to fit a standard picatinny rail. AA9627 SOCOM II with Cluster Rail System Caliber 7.62mm NATO (.308 Win.) Barrel 16.25", Twist: 1 turn in 11 inches, right hand, six-groove Size Weight: 10.9 lbs. (without scope) Length 37.25" long Mechanism Rotating bolt, gas operated, air cooled, semi-automatic magazine fed rifle Sights Front Tritium post Sights Rear Enlarged military aperture with MOA click adjustments of both windage and elevation Capacity 10 round box magazine* Trigger Pull 5 to 6 lbs., two-stage military trigger