SRC new product SR-36C GBB (Gas Blow Back)
product description :
Realistic CNC aluminum barrel
piston rod action
aluminum bolt carrier
adjustable hop up
Nylon fiber + Glass fiber reinforced one piece handguard .
Nylon fiber + Glass fiber reinforced one piece receiver .
Nylon fiber + Glass fiber reinforced one piece foldable stock .

http://youtu.be/3U-YjxmoLKg