Well my 3 nearest sites (the only ones I play at use these rules):
Site 1: 500 fps for semi auto ONLY / bolt action snipers or DMR's (30m engagement min) side arm req
Site 2+3: 450 FPS, same other rules as above
so I would of thought an m4 with long ass barrel, nice hop+purple??? bucking and a high torque motor+gears with 120 spring and metal spring guide would be around the 450 fps mark
Locking to semi... I was thinking of using a programmable fet so that both auto+semi shoot in semi, then like you said a micro switch in the magwell for clearing...
The problems:
I've never modded a gun internally, so I have NO clue on how to do any of this, or which parts to buy... All I know is I want a bad ass DMR because I was going to go down the TM VSR10 route, but tbh I think this way will be better because towards the end of the year I'll probably chuch a P* FE in it to make it even more kick-ass
I also dont want to be spending LOADS, i was thinking of like 200(300 max) for the base then like 100-150 or so max on mods? Would that kind of budget be appropriate (I already have optics so only external mod i'd need/want would be a foregrip+mock sup'.