The G&G PM4 line of Rifles have high standards for their non-metal parts. Just like the real life M4s, the hand guards, grip, and stock are not typically made of metal, but rather a fiberglass/nylon composite. G&G has adapted this same principle in making these portions with some of the same materials.
Specifications .
Velocity 360 FPS
Hop Up Yes, Adjustable
Barrel Thread 14mm Negative
Blowback No
Gear Box Reinforced Metal
Motor Type Standard Long Type
Gun Stock Fixed/ Solid
Fire Modes Semi & Full Auto
Magazine Capacity 450
Caliber 6mm
Comes with:
Battery, Charger, Cleaning rod, Magazine, Ballistics glasses and a small bag of bbs.