[lurkingknight]

why would you want 60rps? What would you possibly need it for?

The cycle completion at 30-40rps with the trigger response is already near instantaneous, which is what 99% of people want out of a build like that.

60rps would mean dsg with a frankentorque motor on possibly 14.8v lipos, not may mags will feed well above 50. 370-400 fps would mean a massive spring like a 150-160, good luck trying to assemble that gearbox. Also because of the shortened stroke, you'll be limited to barrels under a certain length, in fact, with dsgs, shorter is generally better, like 247-300mm in that area. Computerized mosfets don't UP your rate of fire, they turn it down so you aren't an asshat.

The way you're going about this is ridiculous. You want something you don't want to do the research for and just want to wow people with? The fact that you're willing to throw your money around for a ***** enlargement?

Most cqb won't allow full auto anyways, so it comes back to a question of trigger response. You want the gun to react quickly so you can uncover, shoot and cover again without sitting there with your pants down waiting for the shot to go off because of the cycle speed.

60rps is excessive, high maintenance, high cost/little return, and all it will do is piss players off that you hose down with it, especially with full auto.

If you had approached me with this kind of request with this level of understanding of what you wanted, I'd turn you away and tell the rest of the techs in my area about you. lol. That kind of carelessness is what can get people hurt and make me look bad for handing a build like this to someone as irresponsible as that.