Unlike the standard Gen8 M4A1 Blaster, this Gen8 M4A1 comes with a Stronger More Durable Receiver & Buttstock. The gearbox has been upgraded with a stronger Spring, and green oversized o-ring for better pressure.

Description:
– TOUGHER Nylon Receiver
– Nylon Grip
– Top Rail
– Nylon Army Buttstock
– UPGRADED Tension Spring
– UPGRADED Oversized O-Ring

Package Comes with:
– UPGRADED M4 A1 Gel Blaster
– Magazine
– Nylon Army Adjustable Buttstock
– 7.4v Battery USB Battery Charger
– 7-8mm Dehydrated Gel Balls

Please Note that all gen8 gearbox only operates in full auto.