Lostsniper308:
No offence here....I am real reluctent to start giving out any information to modify any firearm to someone to someone 16 years old...without first talking to that persons parents or legal guardian... I will say...any modifications you do to them...other than the o-ring or opening up the barrel channel will void any factory warrenty on it...
I can say that when firing them...place the rifle at or near the hinge pin to rest it...and pull all the way thru with the trigger...that should help your groups alot...and what most folks wind up doing...if the rifle still doesn't group. try a different ammo...and if it still doesn't group.....have your folks call NEF for you and talk to the great folks in the Customer Service department...
Mac