sight base

sight base

[′sīt ‚bās]
(ordnance)
In gunnery, the distance between the eye and the rings of an optical ring sight.
Mount for a gunsight.
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References in periodicals archive ?
Caption: The RBU integrates robust iron sights into the sight base.
Apparently, some enterprising soul in the past attempted to rezero the carbine with the bayonet folded because the front sight index mark was off to the side of the witness mark in the sight base by a good 0.
Elevation adjustment is on the top of the back of the sight base while the windage adjustment is on the right side.
With the barrel/receiver true with the jig and secured in place for drilling and tapping, both sight base locations were marked where the bases would be installed.
No issues were encountered except I had to retighten the red dot sight base once.
Simply tap the side of the dovetailed sight base with a brass punch and hammer.
The post is offset and can be adjusted for windage zero by loosening the retaining screw in front of the sight base and inserting a small tool through a hole in top of the protective hood.
Tenders are invited for Ote: Rear Sight Base F1303- 028081 D In Finished Condition Dc No.
The Razor comes with a Picatinny-style sight base attached.
The front sight base is specially made to suit the low rib and rear sight as Recknagel ring type bases are too high.
Check to see if the line on the elevation cam assembly matches up with the lines on the rear sight base at each of the detents.
It fits the receiver so low the open sights can still be used and snuggles up to the rear sight base so tightly the sight and the rail appear as one.