The M16A2 buttstock is about 5/8" of an inch extended then the sooner products. As a result of greater duration it employed an extended buttstock screw and also a spacer. The swivel is mounted nearer for the buttplate. This buttstock is presently utilised over the M16A4: If it is a https://coltm16a1forsale35555.livebloggs.com/37617492/colt-m16a1-for-sale-fundamentals-explained