is there a silencer for th 1911 and usp .45 and is there one for the 92fs and the mp5a3?
Yes there is. Any reason ya need them ya planing to kill your neighbors dog? Just messin with ya on the dog thing. Yes there is a silencer for all the guns you named above.
Most handguns require a new, threaded barrel before you can install a silencer
you have to make sure they are legal in your area.they are'nt cheap either.and most companies call them suppressors.
The ATF call them regulated. In order to get one legaly you need to go thru much the same steps as you would for a machine gun. These processes take a long time and cost you more money besides the cost of the suppressor.
You need a permit for each one you may want to buy.