I would suggest you go to a few shops that sell them and have them explain things to you
there is special paperwork that MUST be filled out to BUY one, they are not a cash and carry deal
I would also suggest getting a .30 cal suppressor and then you will have more use's for it, you can SHOOT .233's thru it too, so will double up as a possible other rifle suppressor for you
that or go onto a suppressor forum, lots of good one's out there today and will get you up to speed on thing and show and tell more options for you, they are a never ending changing area