Anyone mention an adjustable gas block?

As for accuracy. that's on your capability to hit a target, consistently in the same spot. or close to it. IMO Buy an AR in 22lr and practice with that. OR one of the airsoft AR's Be it 15-20 yards, using an airsoft, or 200 with a real gun. The mechanics is the same. Sight picture, trigger and breathing control and most of all, Practice