This shock absorbing buttstock converts your under-folder AKMS stock to an M16/M4 collapsible and side folding stock. Left-side folding mechanism Spring lock on folded position Locking is released by the push of a button 6061 hard anodized aluminum buffer tube Built-in recoil-compensating mechanism GLR16-S buttstock Integrated quick detach sling swivel connectors on both sides Non slip design provides superior shoulder positioning enhancing tactical performance Fit any M4 collapsible stock Tough and robust design
