Would like to save some of my hearing and am now have this idea of buying maybe a Gentech suppressor for it (full size). This mfr is just an idea.
Some questions:

I would think its best to buy a threaded barrel and keep the original - S&W sells one and Gentech looks to sell a S&W barrel also for similar $$
Allegheny county - does the sheriff oblige?
Is there anything negative to using a suppressor for the gun ie heat etc
I found info on PAFOA but its from 07/08 and would like current info but not really finding anything as I am not sure where to find it and forms needed.
If I do this and get accepted - is it only me that can shoot this gun with the suppressor or can family (in my presense) also shoot it?

Thanks,