Blackhawk! Knoxx Replacement Adjustable Carbine Buttstock AR/M4 Commercial Size Tube OD Green

Precision fit for quick and smooth length adjustment. Designed for comfortable cheek weld. Ambidextrous sling mounting locations for quick detach, 1 to 1.25 inch slings and lanyards. Durable reinforced polymer construction for extreme use. Models available to fit Commercial and Military size carbine tubes (To determine fit measure rear tube diameter, Commerical 1.170 inches, Military 1.146 inches).