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
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
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.