A SIMPLE KEY FOR COLT COMBAT UNIT RAIL GUN 45 UNVEILED

The M16A2 buttstock is about 5/eight" of an inch for a longer time then the sooner products.  Due to the greater length it applied an extended buttstock screw plus a spacer.  The swivel is mounted closer into the buttplate. This buttstock is presently applied on the M16A4:Whether it is a bell shape, that may be right for a Colt. And the gas tube