Why m-lok and not keymod or picatinny?It'd probably be a full custom CNC retroarms build with G&P externals, real steel 12" M lock rail, 14" barrel, top of the line motor, gears and barrel, either a gate titan or spectre, and RS 1X-4X short dot. Would probably set it up as a DMR. A single stock gun though probably a GBLS DAS since that's the only way I could ever justify spending that much on a toy gun