The Echo1 M4 ST6 is a semi/full automatic rifle poised for airsoft domination! This M4 replica has a quad Weaver/Picatinny rail foregrip and detachable rear sights for unlimited customizing options. The receiver is made with ABS plastic that lends a lighter weight to the gun without sacrificing any of its trademark look. The ST6 features a 6-position adjustable stock, a high-capacity 300 rd magazine, and a shot velocity of 380-390 fps (using .20g BBs). Adjust the long range trajectory on your shots with the adjustable hop-up unit. The gun's shortened barrel makes it an excellent choice for cqb airsoft skirmishes, own your battlefield opponents & pick up the Echo1 M4 ST6 today!