Anyone use and own a Wembley VMX Quantum OS in either calibre or either stock plastic or wood. For the price and performance of what i have seen so far looks a nice bit of kit. Is it quality or crap, does it have plastic bits that break like the rear cylinder cap which looks plastic and the trigger guard, anyone have any issues with it. What does it perform like, is the silencer any use or is it just a useful cocking aid. If it ticks the boxes i was thinking of getting it in .177. what do they go for second hand.