The M16A2 buttstock is about 5/8" of the inch for a longer period then the earlier styles. As a result of elevated size it used an extended buttstock screw along with a spacer. The swivel is mounted closer to the buttplate. This buttstock is at this time applied over the https://directorylandia.com/listings490122/helping-the-others-realize-the-advantages-of-colt-m16a1-for-sale