New and never used RIS III 10.5" M-Lock Rail System. I ended up going with a RIS III 9.5" so I have this laying around. If you are not familiar with Daniel Defense products, they all come with their no questions asked lifetime warranty. This warranty is on the product's life. With that being said, you will have this warranty moving forward.

Barrel nut and all screws for installation are included.

For product specifications or further information see the manufactures website at: https://danieldefense.com/risiii-10-5-black-m-lok-rail.html