Im sorry but if your systema is shooting 100yrd 100% on the bull then your one lucky guy. Iv played with a systema for. Few months now (not mine ofc) with the tac mod etc. and it doesn't beat any other high end gun on the field, from g&p to g&g to marui there all the same, the only difference is the real strip down of the gun and the trigger mech. That is it so you payed £1500+ for something you can put in a gun yourself for less then £150 and still have change to get a bag of bbs sorry but systema are over priced and a toy!
If you want realisum get a GBBR and learn the maintain a real gun, none of this stupid electric sounding crap!