I’ve got a Colt AR in 5.56 that my 9 year old is starting to shoot. With the adjustable stock the gun fits him pretty well. Biggest problem is the trigger pull weight (I don’t know what the factory weight is but it’s pretty damn stuff). He has a hard time with a slow trigger press while staying on target. What would you guys recommend for a trigger. Doesn’t need to be fancy, just simple to install and adjust. Thanks