The psl muzzle brake has no effect on accuracy one way or the other.
Limit your shots to one or two before letting the barrel cool. Its a super thin very whippy type barrel and once it heats even a little accuracy goes right to hell.
"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