aperture sight

aperture sight

[′ap·ə‚chər ‚sīt]
(ordnance)
An irregularly shaped adjustable mechanical item usually integral to a rear sight; it functions as a peephole through which the sight at the opposite end of a gun is brought into view in aiming at a target or object.
References in periodicals archive ?
While I like scopes on bolt actions, for leverguns and "just for fun" ,22's, I like an aperture sight.
As the rifle's split bridge receiver prevents mounting an aperture sight in the "correct" position, I think an open U-notch rear sight would have been a more practical choice.
XS Sight Systems presents the Ruger Gunsite Scout Rifle full-length scope rail with aperture sight, which features drop-on installation, and offers expanded versatility, allowing red dots, scout scopes and traditional optics.
Lieutenant Colonel Noor ul Hassam won the Big bore rifle telescopic match, Havaldar Shahid Imran won the Big bore rifle aperture sight match while Major Idrees won the Big bore professional match.
The current system consists of a 12-inch sight bar fitted with a Cobra Easy Slide sight out front and an aperture sight in the rear.
One unique feature is the dual aperture sight so it can be fired with pinpoint accuracy at both close and long range.
In a world overrun with optics and red dots, achieving a similar result at 200, 300 and even 600 yards with a dual aperture sight is a true testament to the skills of the competitors.
Tech-SIGHTS introduces a receiver mounted aperture sight for the Simonov (SKS) rifle.
You can get a ghost-ring aperture sight for it, but since I like to shoot aerial targets, the open sights are just fine for me.
The drop at the butt is large, but the high cheekpiece offsets it and brings the head up to the right height for the rear aperture sight.