10 8 6 4 2
2 4 6 8 10
2
4
6
8
2
4
6
8
10
1=4”
Fig. 1
Fig. 2
Fig. 3
Warning: Be certain that the gun is not loaded, the action is
open, and the muzzle is pointed in a safe direction. Safe gun
handling procedures must be used at all times
1. Scope Mounting
With the rings already installed onto the firearm, separate
the upper section of the rings by removing the screws. Place
the scope onto the bottom halves of the ring. Replace the
top loosely do not tighten.
Rotate the scope to position the elevation turret on top
of the scope (vertical). Look at an object through the scope;
adjust the eye relief by sliding it back and forth until the
correct eye relief distance is achieved. Tighten the set screws
on top halves of the rings.
2. Attach the Boresighter to Firearm Muzzle
Select the appropriate bore arbor from the kit by selecting
caliber indicated next to each arbor and insert the end of the
arbor with brass hinge into the boresighter. Hand tighten the
locking screw to attach firmly the bore sighter (Fig. 1 and 2).
Warning: If the bore stud does not insert easily,
remove and verify that the correct stud is being used
Insert the other end of the stud into the muzzle
(Fig. 3).
3. Pre-Zeroing with the Boresighter
If necessary, rotate the boresighter until the gird lines match
vertically and horizontally with the reticle vectors. Remove
the windage and elevation caps (If necessary) Adjust the
windage and elevation turrets until the crosshairs line up
with the center of the boresighter’s Grid. Each division on the
gird is equal to 4 M.O.A. or inches at 100 yards. Pre-zeroing
the scope in now complete. Remove the boresighter and
bore stud from the barrel and secure it in the supplied case.
Warning: Be certain that the bore stud has been
removed from the barrel. Failure to do so may result
in injury or death to the shooter or bystanders.
At an approved range or other safe area, complete the
zeroing procedures indicated in your scope instruction
manual.
Warning: Eye and ear protection is strongly recommended.
Safe gun handling procedures must be used at all times.
The Barska Boresighter is designed to save you time and
money by allowing you to pre-zero the scope. Final steps
in zeroing should be done at the range. This kit covers
the most popular calibers in the market so you can use it
to zero different rifles and firearms. It’s sturdy
construction is built to last.
BC121
Barrel of
Firearm
(1 pages)
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