Yes, you should put a bipod on your AR 15. With an AR-15 rifle bipod, you can easily stabilize your firearm while improving the precision and accuracy of your shots.  Sandbags work well enough to stabilize your rifle in a pinch, but they aren’t the easiest things to carry with you to the shooting range, making them inconvenient for casual use. Whereas, most AR-15 bipods are small, foldable, and lightweight. They can be tossed in your hunting pack and carried around with you literally anywhere.