Description
This spring-loaded aperture assembly is a genuine USGI contract surplus part, crafted for the rear backup iron sight on the U.S. Army M4 series rifles. The aperture,the small circular sight used for precise aiming,often takes a beating from constant use and harsh field conditions. When it wears out or gets damaged, this part serves as a straightforward replacement, letting you restore the sight’s function without swapping out the entire assembly.
The aperture is spring-loaded, which allows it to flip up and lock firmly into place. This design is essential for keeping a consistent sight picture during the chaos of combat. It fits into a solid steel base that stays fixed to the rifle, making sure the aperture assembly holds steady through recoil and rough handling. U.S. Army armorers have depended on this exact component to keep soldiers’ rifles in working order when the original aperture fails.
Keep in mind, this offering includes only the spring-loaded aperture itself; the steel base shown in the photo is for illustration and isn’t included. Installing it means removing the worn aperture from the existing base and snapping this replacement in,a quick and effective repair that prolongs the life of the iron sight.
Fun Fact: The M4/M16 rear sight aperture assembly was engineered so soldiers and armorers could swap out worn parts in the field using just basic tools,an important feature that helped keep these rifles reliable through decades of service around the globe.
