I think this bag is the perfect size to support the rear of a precision rifle when using a bipod. I also use this bag on the front of the rifle when shooting off rocks or other uneven surfaces. The bag works really well to fill in gaps and get stability for long range shooting with a bolt gun or with the carbine. It’s a perfect size to fit in a pocket without much bulk, it also has a 550 cord loop to snap link it to a backpack or rifle. The WOTG rear bag is filled with small plastic beads so it’s waterproof, light and pliable.