This AR-15/M16 Bayonet Lug Bipod mounts onto most AR-15, M4, and M16 (A1 & A2) Mil-Spec bayonet lugs. The bayonet lug mounting point adapter allows the bipod to be quickly detached from your AR-15 rifle. This bipod is an excellent accessory for your AR-15, M4, M16A1, and A2 rifles. The AR-15/M16 Bayonet Lug Bipod Mount features height-adjustable legs, with a collapsed height of 8.25 inches and a fully extended height of 11.0 inches. The Mil-Spec bayonet lug bipod mount includes a ball swivel joint, enabling small aiming adjustments without lifting the bipod off the ground. A quick-release push button on each bipod leg locks into any of the notches, allowing you to extend or collapse the legs to the desired height. The bipod legs can be folded together and positioned horizontally for resting. The bipod has non-slip rubber feet for stability and is constructed from lightweight, aircraft-grade rugged aluminum, weighing just 9.9 ounces. It comes with a limited lifetime warranty.