I'm considering what upper to put on my group buy lower and right now I'm looking at this one ->
http://www.rockriverarms.com/index.cfm?fuseaction=category.display&category_id=271
I'd like to put a BUIS on it, and I'd especially like to get a bargain, like say a group buy bargain ending Friday. The problem is the ARs I see BUIS on have an unbroken, level rail on them and this upper appears to have it's rail and front sight rail section on different levels. To me that means a standard BUIS won't work because the two sights will be on different levels, causing the sights to be out of alignment with the barrel. Am I missing something? Do the BUIS have some sort of adjustment (that doesn't use all the elevation adjustments) to take this into account?
-Nat
http://www.rockriverarms.com/index.cfm?fuseaction=category.display&category_id=271
I'd like to put a BUIS on it, and I'd especially like to get a bargain, like say a group buy bargain ending Friday. The problem is the ARs I see BUIS on have an unbroken, level rail on them and this upper appears to have it's rail and front sight rail section on different levels. To me that means a standard BUIS won't work because the two sights will be on different levels, causing the sights to be out of alignment with the barrel. Am I missing something? Do the BUIS have some sort of adjustment (that doesn't use all the elevation adjustments) to take this into account?
-Nat