Airsoft rifle TR4-18, Full metal, pneumatic blowback

G&G Armament (Taiwan) is a manufacturer with a long tradition. It offers high quality workmanship, performance and reliability.

The weapon is all metal made of aluminum alloy. Metal upper and lower receiver perfectly fit. There appear to be no burrs or traces of casting. The body has modern shape. Magazine can be released from the both sides of the receiver. Also selector switch is on the both sides of the gun.

An interesting feature is pneumatic blowback system.  Most manufacturers only hook this bolt plate behind the inner piston. And bolt plate moves during shooting. However, G&G has found another way. There is a pneumatic piston above gearbox. Air from the cylinder goes above the gearbox and push this pneumatic piston which is conected with the bolt plate. After cyclic move, air goes back to the cylinder so there is no pressure lost. System is very effective and do not stress motor, piston or battery.

Another interesting and definitely original thing is the functional forward assist button. The button on the right side of the body, which is just a malfunction on common airsoft weapons. Not here. After shooting, the piston may be in the rear position and compress the spring. It is good to release it before pack the gun and do not stress the spring and lose power.  Just press this button and it will release the piston and spring. Easy!

The battery is inserted into the body of the plastic sliding butt style Crane LMT. The gun has a classic MiniTamyia connector. The stock is obviously sliding, six-position.

Magazine is metal, high cap - 450 BBs.

Inside the gun is metal gearbox with an 8mm ball bearings, steel gears and M120 spring. Velocity of this gun is about 125 m / s (410 FPS). Suitable ammunition is 0,25g BB. Use twin battery 9,6V NiMH.
 

ATTENTION
Once you set up the hop-up alway set the hop-up to minimal - the adjustment knob is turned to the left. Shoot several BBs, gently pull the adjustment knob to the right. Repeat the process until you reach the desired hop-up effect. Too much hop-up (knob turned right) can cause the BB jam and, in the extreme case, piston damage.
THERE IS NO WARRANTY FOR THIS TYPE OF DAMAGE.