AR-15 iron sight picture and alignment basics

A usable iron sight picture is simple: center the front post in the rear aperture, level the post tip on the target aiming point, and keep that relationship consistent shot to shot. Flip-up sets like FBUIS-B only give you that picture when both sights are locked upright.

View FBUIS-B on Amazon

Build the picture

1. Equal light ring around the post inside the aperture (not jammed to one side).
2. Flat/top of the post bisecting your intended POA (6 o’clock or center hold—pick one and stick to it while zeroing).
3. Same cheek weld every group; changing head height changes the picture more than a click of windage.
4. With dual apertures, the small hole makes centering easier to see; the large hole is faster but less precise.

FBUIS-B context

• Matched aluminum front/rear · spring-loaded flip-up · Picatinny
• Precision + CQB rear apertures · windage/elevation dials
• 3.84 oz · Model FBUIS-B · ASIN B01AISP1KW · UPC 784672554763

Buy Ozark Armament Flip Up Iron Sights (FBUIS-B) on Amazon

Specs from the public Amazon listing only.