Have an ARMS SIR on my AR, which Arms 22 rings? Low? Mid? High?  Anyone have a pics so I can get an Idea.  My rifles has the Arms 40L as the Buis. Any help is appreciated.

Haven't bought the scope yet... looking at either a Leupold MK4 30mm tube with a 50mm obj or a Super Sniper with a 42mm obj.  Leaning toward the SS due to price and smaller obj. Have not decide whether to go 10X, 16X, or 20X.

I have a SIR and had to use High rings to mount a Burris 4-14.5 power scope.  The Med would work better but the bell on the scope would not clear the SIR rail with the flip up covers on it.  If you don't plan on using the Buttler Creek covers you should be fine with the Med rings.  I believe the Objective was 42mm (not exactly sure).

It put the scope way to high with the High rings (1/4" of clearance between the bottom of the scope and the top of the SIR rail).

I ended up putting a different scope.