Perfect upgrade for a-1 factory sights. - Meprolight TRU-DOT Self Illuminated AR-15 Rifle Night Sights

The front sight post is the correct round version for A-1 rifles (Fit my Colt SP1 with no issues) and glows very bright. The rear sight (4-dot version) does not glow as bright as the front and I was initially concerned. However, in low light conditions the four rear dots are the perfect brightness and contrast to the front post making centering the front sight easy. After sighting in the new sights I was consistently hitting 1 gallon jugs at the 300yd mark at the public range.