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A hop up that can move is a hop up that cannot be consistent
Same internal design as the other compact PolarStar regulators (Micro Reg GEN2
and follows the same specifications as a Milspec buffer tube
This model features the standard A&K connector such as used with the A&K M60 and PKM series so that no soldering or splicing is required
A&K/JG SR-25 Installation Spacer Kit Wire Harnesses A hop up that canThis 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
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