I have a 45 acp AR pistol that I've put a T-1 on with a riser. The problem I'm finding is that the aimpoint is running out of elevation to match POA to POI. Does anyone know of a 20 moa mount or similar for the T-1? I've used google, but I can't find anything of substance.

I would think something like this might help. I wouldn't necessarily use this brand though.

https://www.amazon.com/Weaver-Flat-Riser-Rail-20MOA/dp/B004NRVLVS