Recently acquired a CZ-6A. Not too sure it was a great move. Comparing the all-metal mode depth to my CZ-7a pro, the pro is about 3 inches deeper. Should they be about the same in depth? Also the audio loudness is different. At max volume the 6's seems maybe loud enough and where it doesn't hurt the ears, but the 7's is unbearably loud and must be turned down. Should the 6's be a lot louder than it is, where at max volume it hurts the ears too? Thank You