X-Valve – The new Umarex Export Kit for HDR50, HDP50 & HDS68 We now have the new X-Valve tuning valve for the Umarex T4E weapons in our range for you. This kit triples the performance of the Umarex T4E weapon from the factory setting of 7.5 joules, namely to approx. 20 joules. What buyers need […]