Drop-in design compatible with all factory Ruger 10/22 .22 LR receivers; Reinforced polymer construction for strength and durability; 60 degree grip angle from bore axis; Non-slip rubber butt-pad; Reversible barrel tray accepts all factory barrels as well as aftermarket up to 0.920" diameter (12.5" minimum length); Compatible with all capacities of factory Ruger 10/22 magazines; M-LOK slots on forend sides and bottom for a wide variety of accessory and sling mounting options; Push-button QD swivel compatibility in rear with optional Sling Mount Kits; Left and Right rear 1-1/4" Footman's Loops; Black Finish