Peter's opinion aside, there is nothing wrong with a Mac 10. There may be a little bit of snobbery in some folks opinion of the Mac since they are the most economical FA these days. They are a fun gun, spare parts are easy to find and cheap (except for 9mm mags for the M10/9) and there are a lot of parts that you can change to customize the gun to your taste. The Mac's folding stock leaves a lot to be desired -- that is one downside. They also fire fast and some have refered to them as a bullet hose. I have a couple of Mac's and they run and run and run. Here is one with an original style two stage suppressor: