bar sight

bar sight

[′bär ‚sīt]
(ordnance)
The rear sight of a firearm, consisting of a movable bar, usually with an open notch.
References in periodicals archive ?
Also available is a 12-gauge Realtree APG M3000 with pistol grip, 24-inch barrel, IC, M and XFT chokes, and red bar sights.
The 12-gauge turkey version of the M3500 Realtree APG shotgun features a pistol grip, 24-inch barrel, 4+1 magazine capacity, red bar sights, a full set of chokes and a 14 3/8-inch length of pull.