Black Anodized Matte Finished makes it Anti-Corrosion
45 Degree Picatinny Rail Mount with Picatinny Weaver Rail Supply 45 Offset Angle to aim on Target.
3 Items in one Package.so you could better use Flip Up Iron Sight.you could use Front Sight, Rear Sight depend on 2 of them.
Picatinny Weaver Rail
3 Items in a Package