Automag RT rail. No rail shim. Drilled for vert asa, heavily used off ex rental. Came off a rental mag from Brandon Cayetano. Has gunk stuck to it all over (that doesn't come off easily). I would recommend taking a tooth brush and cleaning these out. Lots of dirt caked in them. I bought a couple and am keeping a few and selling a few. Wear is visible all over. Has pressed in plates on the sides, see photo. Excellent rail to mill down.