JM J12 AK74u Hop Up

The jm j12 ak74u hop up is compatible with outer dia 9.5mm inner barrel gel ball blaster

Increase the shooting range of 5-10 meters

Can be inserted into inner dia 13mm fire cap that with 14mm CCW 

Maker: DK

Material: 3d printing pla

Length: 40mm

Outer diameter: 13mm

Inner diameter:  9.5mm

Weight: 4g

Package: 1x jm j12 hop up