First off i apologize if this has been covered before. I shoot prs and my 9 year old wants to start shooting with me. He already shoot to distance with his howa 223. That gun is too big for him and the twist is 1:12 so for playing at club shoots its really a no go. He shoots my M&P sport well since the LOP can be shortened to him. Also he got to shoot a top end AR type rifle at the last shoot he went to that the gentleman was fire forming the brass. He did quite well shooting that platform. I know a lot about bolt guns but really am way way behind the curve on gas guns. I have a budget of about $1200 for the rifle only, i already have quality glass. What would be a good way to go so that once he gets a little bigger i can get him a good custom bolt gun and i would be left with a good gas gun? Thanks in advance.