GBBR 6604T M105 Metal part end of the

Metal part end of the stock

Real wood handguard (fishbone) for authenticity

Tough Nylon plastic pistol grip

Reinforcement – Solid metal rod for added strength

Also the semi-auto function has a higher FPS than full-auto function

GBBR 6604T M105 Metal part end of theFull metal construction Fixed stock with triangular polymer handguard, stock and pistol grip M4A1 Style Realistic recoil impulse Stops firing when empty Steel Bolt catch Ambidextrous magazine release Gas Magazine pull back loading Functional Bolt hold open and release Full sized reciprocating bolt carrier Military style GBBR Iron sights included Metal carry handle Realistic sized receiver and pistol grip Ambidextrous charging handle Adjustable HOP UP