I recently bought an SR-556 rifle which I put 40 rounds through the other day. But something about the sights just wasn't working for me. When using the small aperture, I couldn't really tell if the front post was centered. I don't know if this is a contributing factor, but the concave side of the sight faces away from the shooters eye while on the M16A2 series, it faces towards the eye.

My vision is 20/20 as of August. I qualified expert on the Navy M16A3 qualification course as recently as July.


Heres the rear sight: http://store.troyind.com/Rear_Foldin...fbs-r0bt-0.htm

and the front:
http://store.troyind.com/Front_Foldi...bs-fhbt-00.htm