A skeleton type aluminum butt, profiled for airsoft masks and full helmets of the 5KU brand in particular. Allows positioning, and aiming with sights and optical sight with low mounting. A simple and effective assembly on the rail assemblies available. The butt folds to the side along the body of the replica, which facilitates the transport of the rifle. CNC manufactured with a matte black finish, which protects it from corrosion.
Clamps on any 1913 Picatinny 20mm Rail or SIG MPX / MCX Series.

