Could you define " all over the place" and what type of ammo are you shooting? Are you shooting off of a rest or bipod or?
Many things can effect accuracy on a AR, can you mount the scope on the upper receiver picatinny rail without the riser?
This may take a few back and forth posts here.
The 6.8 is the fastest growing cartridge and #1 choice for hunting deer and hogs with an AR15.
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