BSA Optics TW4X30 - Manual (Page 4)

cover/mount is all the way forward, then push the retainer pin back into the
receiver and click it downward until it locks in place and is secure.
NOTE: Should you not be able to lock the retainer pin you will need to fit
the cover/mount to your particular SKS. All SKS rifles vary greatly in their
tolerances, so the front forks are made a little large on the cover/mount to
account for the largest fitting SKS models.
TO FIT THE COVER/MOUNT: Note the angle on the front forks. Slightly file
across both front forks at the same time and at the same angle they are cut
with just a few strokes. Be careful not to remove too much material or this
will cause a loose fit. A tight fit will hold the cover/mount solid and secure.
Retry installation until the retainer pin is locked in place. If needed, repeat this
process a little at a time until the retainer pins locks securely in place.
CAUTION:
BE SURE THAT THE FIREARM IS NOT LOADED.
PRACTICE SAFE FIREARM HANDLING AT ALL TIMES.
3.) PRE-ZEROING
Locate an appropriate location to fire your rifle and set up a target at a
distance of 100 yards* from your shooting location. You should use a
comfortable gun rest to eliminate as much human error as possible. Make
certain the rifle is empty with no cartridge in the chamber and the breech
open. *The TW4x30 has a 100 yard parallax and fast focus knob.
Adjusting Push-Pull Windage and Elevation Turrets
ELEVATION:
Pull the elevation turret up until it stops. The turret has now
engaged the adjustment body. Turn the turret clockwise to lower the point
of impact and counterclockwise to raise the point of impact. Once you have
adjusted the point of impact push the turret down until it stops. Your elevation
adjustment turret is now locked in place.
WINDAGE: Pull the windage turret up until it stops. The turret has now
engaged the adjustment body. Turn the turret clockwise to move the point of
impact to the left and counterclockwise to move the point of impact to the
right. Once you have adjusted the point of impact push the turret down in
until it stops. Your windage adjustment turret is now locked in place.
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