hand guard has a lot of slop. Have bi pod adapter on it from harris. trying to get slop out of hand guard. already got accuwedge to tighten up upper to lower. it helped some. got to get rest of slop out of this thing. thinking about mounting a bigger scope on this thing. shot .8 groups at 100 with a 6 power the other day. shoot 6.5x47 lapua ground hog hunting. trying to get this AR to take shots out to 300 then going to use the lapua for past 300. Need any suggestions you can give me. I think this thing could be really nice it's just loose. Its bushmaster 16" barrel. 223. been shooting 69 smk might switch to 40 v-max but I don't know. mk seemed to do the job this evening.