I just recently purchased a Glock 22. After I bought the gun (from Cabela's) the local gunshop owner is telling me about all the problems police dept. are having with this model, ( stovepiping, unsupported chamber) He even said that the polymer frame is identical to the Glock 17 9mm and cannot take the toque of the .40 cal. cartridge. Are these problems legit, and if they are is there anything I can upgrade that will solve the problems?