Ultimate Arms Gear Black Weatherproof Canvas Stock Sling Leather Tab End AR15, AR-15, M4, M-4, M16, M-16 Rifle Gun Complete With 1 Leather Tab & 1 Hook. High Grade Leather Tabs for Swivels. High Grade Canvas Construction. Weatherproof. Fully Adjustable - For A Perfect Fit with Swivels. Easy Adjustment Provide Different Length For Various Shooting Positions.