Replaces the original hand guard and give the option to mount grips, bipods, or any other accessory based on picatinny rail. Made from 6061 T6 aircraft Aluminum. All rails 1913 mil spec. Hard coat anodized. Special design one solid item with only one bolt to lock. Lightweight and strong. Easy to mount, require no gunsmith. Do not extend over the original size of the hand guards. Gun handling will remain regular. Will not move or vibrate on the gun at any conditions.