M16/AR15 type of weapons are undoubtedly the most used worldwide. Originally, this model was designed by Eugene Stoner for ArmaLite company. Later it received property rights from the U.S. Government, which allowed them to provide to other arms factories in the World. M16A4 (M15A4 SPR) is one of the latest improved models of M16 series, which differs by its long heavy barrel, metal RIS handguard and detachable rear sights on which it is possible to attach different scopes and red dots onto the sight. This metal model is produced by Classic Army. Includes a reinforced gearbox version 2, High Speed & High Torque motor, fixed stock for placing a large battery and a long barrel. Gun is supplied from the new edition 2009, which has a newly manufactured metal body with functional dust cover and contains ball bearings 7 mm, a spring M120, vacuum piston head and spring guide with the bearing. Metal Hop-Up
chamber is co mmon for these weapons. As a standard the gun is delivered with covers on RIS rails and tactical grip .