The M16A2 Buttstock is about 5/eight" of the inch for a longer time then the earlier models. Because of the amplified size it made use of an extended buttstock screw plus a spacer. The swivel is mounted closer on the buttplate. This buttstock is currently utilized about the M16A4: AR15.COM https://thesocialdelight.com/story3970660/colt-combat-elite-commander-45-acp-for-dummies