After freezing my ass off in the basement and having cold hands, AND chronying my 340fps G19 (got in the 260fps range), I'll have to retract my "20-22C" I've been testing the MK23 with the 380 kit with. Will have to wait til summer to see if I can actually get much higher than 315fps (stock). Some of the parts in that kit didn't fit in my MK23, the important ones did though (the rocket valve tube thingy, and it's spring), so we'll have to see.
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