The M16A2 buttstock is about five/eight" of the inch for a longer period then the earlier versions. As a result of greater size it utilized an extended buttstock screw in addition to a spacer. The swivel is mounted nearer towards the buttplate. This buttstock is at present utilized around the https://mynichedirectory.com/listings12970391/facts-about-colt-combat-unit-rail-gun-45-revealed