Selling this Federal Mk4 rail. I bought it from Geisseles Count Blemula Sale thinking it was the version with more rail on the bottom, and it was not. The only blem I could find was the machining marks on the bottom. It was never mounted to a rifle. Looking to get 140. If you are interested or have questions please text me at EightThreeTwo-FourTwoEight-SixEightFourNine