A&K/JG SR-25 Installation Spacer Kit Wire Harnesses Same internal design as the

Same internal design as the other compact PolarStar regulators (Micro Reg GEN2

(Modification of the gearbox is required)

This design lets the JACK™ send a higher flow of air down the barrel than systems that only use a solenoid as the firing valve

and follows the same specifications as a Milspec buffer tube

The HPA (2

A&K/JG SR-25 Installation Spacer Kit Wire Harnesses Same internal design as theThis spacer kit allows a V2 Fusion Engine to be used in the A&K and JG SR25 rifles. Since these models use an "V2 Long" gearbox, the standard V2 Fusion Engine will not be long enough to interface with the rifle's hop up chamber and stock bolt. The included Delrin spacer extends the front of the engine so that it will be the correct length to match up to the hop up chamber while the included Nut provides an anchoring point for the stock bolt. Spacer