GRS Rear Bag will help you shoot more accurately with Bipods. This works better than monopods. The bag's surface is smooth to let the stock slide easily during recoil, giving you maximum accuracy. The rear bag has a carabiner hook integrated, so you can easily attach this to your rifle sling, thus preventing losing the bag in the field. GRS Riflestocks GRS Shooting Pillow/Rear Bag 104452