[Hectic]

the trigger box is off from a vsr but it could accept sears from a vsr, the piston looks like a vsr piston but its hard to tell without a measurement, the hop up chamber looks like it may be simaler in design to a vsr one tho the arm with the nub seems a lil shorter, if u remove the adjustment arm off a vsr that is, then it would be able to adjust with the screw from the top but again without measurements who knows, i tryed to find my old vsr piston to measure but couldnt, i do have a cylender and hop chamber tho so i could check those out. Nice review it does look promising if the upgrades wind up being mostly vsr stuff.
i think the 388 and 700 are spose to have the same operating system just slightly different exterior, ie the mag/magwell and materials on the upper.