The M16A2 buttstock is about five/eight" of the inch lengthier then the sooner versions. As a result of increased duration it made use of a longer buttstock screw plus a spacer. The swivel is mounted nearer for the buttplate. This buttstock is presently applied on the M16A4: Colt has promoted https://riverlmlii.wikibestproducts.com/1095902/the_5_second_trick_for_colt_combat_elite_commander_45_acp