yoyo

 First off this is my second post and my first AR-15 I just bought a bushmaster dissipator and i love it i also have a 2stage comp trigger set very light .
I just got from a friend a target upper with a ssbb. with all that crap said i do a lot of boltgun target shooting so my question is my groups are printing in two places about an inch apart i will get three in a nice clover and two in one hole but my shots are from one spot to another and then back. can this be from a little play in the upper and lower?
or what

vinnie