The stock trigger is a Critical anyways, right?
Stock regulator and LPR is really good as well.
Learn how to tune and maintain your marker, make sure the bolt is oiled with a non-petroleum or water based lubricant and you're golden
oh, and don't shoot marbles. I mean, if you want to nail someone, go ahead and lose your chance at having a future, but remember that it will ruin the breech, bolt and barrel of your gun.
Having a broken nice gun always sucks more than going to prison for at least 2 years for puncturing someone's skull with a "firearm"