I have a 10" quad rail that came on my M&P15T, it is a 10 inch free floating quad rail made by S&W, I have the original barrel nut and screws needed for installation, It is the rail that comes on the M&PT with sku #811041. It is in excellent condition and barely used other than some cosmetic blemishes from taking rail covers off. NOTE: I am only selling the rail, not the gun or MBUS sights, asking for 70$ shipped. Thanks for viewing, there is a link at bottom to take you to S&W website which shows the rail on an M&P15.
Product: Model M&P15T - 5.56 mm, Tactical
Product: Model M&P15T - 5.56 mm, Tactical