The best way to determine the accuracy of your rifle and ammunition is to shoot them from a solid bench, with a quality shooting rest. With precise repeatability of shots as your goal, The Rock Deluxe Front Rest and Rear Bag Combo is the right tool for the job. The Rock helps eliminate the "human factor" in shooting and will help you shoot tighter groups. The Rear Bag securely supports your rifle reducing drift and wobble. Specifically designed for AR-15 and LR 308 rifles Perfect shooting height with plenty of clearance for 30 round magazines Rear bag is designed to fit collapsible M4 stocks on one side and fixed A2 stocks on the other Rifle can easil Mfg: Caldwell Shooting Supplies