Does the MOE handgaurd sit lower on top than the GI round versions? I can't slide my Eotech 512 forward with current handgaurd - it hits. I don't want to raise the 512 - it co-witnesses perfectly with iron sights now. If Magpul won't work any other suggestions? Not wanting to go to a 4 rail system - trying to keep things simple. Wanna kill these ads? We can help!