Adjustable 3D Print Hop Up for JM Gen13 SJ M4 MK18 Once in programming mode

Once in programming mode

Motor type: 370

Safe and Fun: The Mini AK gel blaster shoots safe and non-toxic Orbeez

durable design

Its popularity stems from the integration of the JinMing Gen8 gearbox

Adjustable 3D Print Hop Up for JM Gen13 SJ M4 MK18 Once in programming modeThis adjustable 3D print Hop Up is compatible with the SJ M4 MK18 and JM Gen13 gel blasters. Improve your accuracy and precision with this professional grade upgrade. Easy to install and use, perfect for gel blaster enthusiasts and experts. Don't settle for less, upgrade your blaster with this hop up today. Good for jm gen13, sijun sj m4 and sj mk18 gel ball blasters. Specifications: Brand: DK. Material: 3d print. Color: black. Length: 50mm. Outer