Full power kit for HDS Umarex in caliber 68 Rocketkey
This expansion valve increases the power of your Umarex HDS.68 defense marker up to 20 joules (depending on the type of ammunition and the ambient temperature).
This valve is made of high resistance aluminum and has an excellent finish.
Increase power to 20 joules!
Its installation is easy, you just need to replace the original parts with this kit. This conversion is not visible from the outside.
The set includes:
1x valve pin
Attention strong increase in power!