I'm wanting to turn my predator into a carbine, Iron sights, a short barrel and such. I had an idea to put a rear iron sight onto the rear receiver drilling (not the weaver itself, the holes under it). However, I haven't been able to find an iron sight that would fit into those holes like the weaver base does. This might? http://www.midwayusa.com/product/69...t-assembly-remington-700-870-less-base-screws So my question is, does anyone make a sight similar to this, or a ghost ring, that fits the rear drilling?