Plug'n'play MOSFET's are almost a waste of time. The whole point is to avoid the high resistance of the trigger switch - the command wire approach, where a command voltage opens the electronic switch instantly, allowing power to run directly from battery to motor along fat wire through soldered connections is the way forward. Of course it requires a little more work to fit and, if you compromise the insulation, you may short out the FET and cook it dead, but the results are worth it, and you've got the skills needed.
Gate Electronics Pico AB are good and the non active breaking Pico also (SSR iirc). I recommend AB because if you do decide that 11.1V is the way forward eventually, that voltage can make guns fire full-auto even though semi is selected; active breaking prevents this fault. It also makes the gb end its cycle with the spring in its most extended position, which is good for the longevity of the spring and the gb in general.