http://www.patreon.com/ForgottenWeapons Cool Forgotten Weapons merch! http://shop.bbtv.com/collections/forgotten-weapons Lever-delayed blowback is a relatively uncommon action system, although it is applicable to a wide variety fo firearms and has been successfully used in submachine guns, rifles, and light machine guns. It uses a principle of mechanical disadvantage on a fulcrum lever to force a mass to accelerate rearward while the bolt remains closed. This allows the effective weight of the moving parts to be amplified, resulting in a lighter firearm. Contact: Forgotten Weapons PO Box 87647 Tucson, AZ 85754