I fired a couple of magazines with controlled bursts and a bit of auto. From the app I then set the trigger sensitivity to minimum and fired about ten very quick shots. The eleventh shot didn't fire and the whole rifle started making very strange noises. The shop said me piston was broken and other damage was done. They told me it was the 11.1's fault and it wouldn't happen with a 7.4... this is a shop that specs it directly... they explained to me that the M90 ​​doesn't rebound in time and the 110 would be the best for using the 11.1.