The M16A2 buttstock is about five/eight" of an inch extended then the sooner versions. As a result of increased length it utilised an extended buttstock screw and also a spacer. The swivel is mounted nearer towards the buttplate. This buttstock is at this time utilized about the M16A4: Colt has https://bouchesocial.com/story20430070/facts-about-colt-combat-unit-rail-gun-45-revealed