Centurion Arms C4 Diopter-style iron sights are for use with AR-15 or M4 flat-top receivers.
The sights are designed to the correct ergonomic height for the standard AR-15/M4 flat-top receivers in any of the popular calibers, including 5.56, 300BLK, 9mm, etc., for the proper feel and rapid sight acquisition.
It uses a standard HK type adjustment tool for windage and elevation. The front sight mounts to any commonly available same-plane rail style handguard that is the industry standard. It uses a standard fixed blade that can be replaced with the tritium front sight blade commonly sold for the HK91/94/93 and MP5s.
Both front and rear sights are also compatible with any standard AR-15/M4 sights, including any standard height backup iron sights or the detachable carry handle rear sights. This offers the shooter maximum sight options.
The Centurion Arms sights also take up a minimal amount of rail space, leaving plenty of room to be used as backup iron sights in conjunction with Aimpoint, EO Tech, and most other readily available red dot sights.
