The XTM Rail Panels are low-profile, two-piece covers that attach anywhere on a 1913 Picatinny rail without having to remove previously mounted accessories. The design and reinforced material construction ensure the panels will remain in place under all operating conditions, but allows for easy removal using the tips of two rounds when necessary. Each set comes with four (4) two-piece panels which will cover ONE side of a carbine rail. Made in U.S.A.