The SIG Sauer M400 TREAD is the hottest new rifle to hit the market and now SIG Sauer is excited to offer a factory replacement back up iron sight set to match your rifle. The TREAD sights will fold down easy and will stay stowed in the folded position until such time that you would need to deploy them. The rear sight features a dual aperture for precise day shooting and night shooting along with a windage adjustment screw. The front sight is adjustable for elevation and functions just like a classic military sight.This particular sight set includes a picatinny rail with a mounting screw and nut which are compatible with the SIG Sauer TREAD hand guard. This sight set is built exclusively for the TREAD picatinny rail. The finish will match your rifle as this sight set features a nice matte black finish.If you're looking for affordable SIG Sauer Factory parts and accessories, look no further than Cheaper Than Dirt. We have the very best selection of SIG Sauer factory parts and accessories for sale you'll find online.SIG Sauer M400 TREAD Sight Set (Black) Specifications and Features: KIT-TRD-SIGHTS M400 TREAD Sight Set Factory Replacement Part Back Up Iron Sights Front/Rear Flip Up Design Dual Aperture Rear Sight Quick Deploy Foldable Exclusively for the Tread Rail Matte BlackIncludes: Front and Rear Sight Picatinny Rail Mounting Screw/Nut for Picatinny RailFits: SIG Sauer M400 TREAD AR-15 Semi Auto Rifle Hand Guards