The G&G GR4 100Y airsoft rifle is a lightweight and durable M4 styled airsoft gun with impressive electric blowback recoil. This high-powered AEG is a solid performing gun for intense airsoft skirmishes. The rifle features removable front & rear sights that expose a monolithic top rail, a high-capacity 450 rd magazine, and a shot velocity of 350 fps (using .20g BBs). Mount a rifle scope on the monolithic top rail for unbeatable versatility and superb accuracy. The adjustable hop-up unit dials in outstanding long range accuracy needed to excel in skirmishes. This rifle will offer airsoft enthusiasts with hours of semi/full automatic shooting enjoyment!