I'm finally going to the effort and expense of setting up an AR for home defense. I have a Trijicon RMR that has been just sitting around since I sold my milled G19 a few years ago, so I bought a Scalarworks 1.42" mount and put the RMR on a 16" AR with a 13.5" rail. The storm kept me from going to the range today, but just handling the rifle around the house, I think the RMR is going to be close to perfect for this role. My next decision is what kind of light get. I'm trying to decide between a Surefire Mini Scout Light Pro mounted at ~10:00-11:00 and a X300U-B mounted at 12:00 in front of the folding front sight. I think I would like the X300U the most because it just seems simpler and tidier than having a light hanging off the side of the gun. However, I worry a little bit about the light intruding into the sight picture of the RMR. If I were running a SRO or MRO or had bought a 1.57" mount, I wouldn't worry about it so much because the dot would be a bit higher. If anyone has run a RMR (or any dot with a similar height over bore) with a light at 12:00, I'd certainly appreciate knowing what you thought of it. Hopefully I'm just overthinking this.