unless a suppressor is using a wipe type system they all have first round pop regardless of brand.
first round pop is the rapid expansion of hot gasses in the oxygen rich suppressor after the first couple of rounds they quiet down a bit. if you wait a bit between shots air will get back into the suppressor and they get a little teeny bit louder. like the first shot was.
to get around that some folks put wire pulling gel or water in the suppressor.
i dont bother with it since its not really that noticable.
i would recomend the silencerco sparrow ss. small light works great on a ruger mk3
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent