I recently bought this for my 870 to mount my Red Dot on. I deburred the inside a little and installed it. It fits perfectly, and really holds shells tightly. I've decided to have my receiver drilled/tapped for a pic rail, and now i don't really need this. It is really high quality and definitely does what it's made for. You can look through (under) the pic rail and see the bead sight easily. I paid about $110.000 plus shipping. I'm asking $75.oo shipped, via Priority Mail. I prefer PayPal. If you're interested, let me know.