C4 Diopter Sights

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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 ect) 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 hand guard that is the industry standard. It uses a standard fixed blade which 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 back up 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 back up iron sights in conjunction with Aimpoint, EO Tech and most other readily available red dot sights.


  • 5
    Excellent sights

    HK sights are sweet and putting them on an AR-15 just kicks ass! I put these on my go-to rifle and it makes shooting with iron sights a little more fun.

  • 5

    I have a lot of time behind the MP5 family of weapons and I always liked the sight system. Some companies have similar styles, such as Troy, but not totally ‘right’. These, however, deliver! I’m glad Monty and Connie decided to re-release these!

  • 5
    My wait is finally over !

    I had the pleasure to use these sights on my friend's M-16A1 years ago...and have been looking for them ever since. I tried the HK416 sights, but they were too short to use with the standard A2 front sight. As soon as I got the email notification that these were back in stock I ordered them without hesitation. After nearly 6 years, my AR build will finally be completed ! Thank you !