What is MI telling you?
What is Armalite telling you?
Why does Armalite list a BUIS for their gas-block equipped M-15s (AR15 models) that won't allow an accurate zero? This isn't sounding right, and it sounds to me like you're mixing AR10 issues in with AR15 issues, i.e., put an AR15 BUIS on an AR10 and it won't work. OK, got it. But who's saying you can't put an AR15 sight on an AR15 gas block?

