Ah right yeah I saw them the other day. As a drop-in solution it's kinda expensive if just buying it to replace what you already have, however if you just want something to fit and go the quality is really good. So far mines performed really well. Had one battery it didn't like though and would just not function with it.
and if you have it on any setting but semi semi then it will start bursting on semi when pulling the trigger quickly
this is because the processor cant handle tell the difference between multiple rapid trigger pulls and the microswitch being left open (which is how it works in full auto)
I found mine very tempermental, and have taken it out now.
The jefftron v2 processor, i had one in my ar15 and one in my scar
both played up when trying to fire too quick in semi where they started bursting
locking it to semi semi helped for a while however the final straw was when they started bursting in semi whilst locked to semi semi
i emailed jefftron themselves and they said it was just how it was and the processor couldnt handle rapid trigger pulls over a certain ammount due to the design
however while the processor worked it was fine and had no other problems, so you could run it in woodland and it would be fine, even great
however for cqb semi auto sites like the mill in wigan then ppl start getting upset when your gun starts bursting them