Tanie Militaria gives a full review of the WE Airsoft Hi-Capa 5.1 Version R GBB Pistol that they have at their store... "The replica was made of metal and plastic . The pistol grip, magazine release and some elements of the internal mechanism are made of plastic. The remaining elements are made of metal, which gives the replica a realistic weight and durability. Metal lock and perfect fit ensure long and trouble-free operation of the gun.

The replica is very well balanced. The profiled handle has a rough surface, thanks to which the gun lies firmly in the hand. The Blow-Back system  adds realism to the work, and an efficient bolt-catch will lock the slide in the rear position after the last pellet is fired from the magazine.

The model has two fuses , securing the pistol against automatic firing - classic wing type, and on the rear part of the pistol grip. This solution requires an appropriate grip in order to shoot. The replica was equipped with a mag well that facilitates reloading. The rear sight is adjustable.

The magazine is made of metal and will hold 30 BB pellets."