User's Manual
RAZOR
®
HD GEN III
76
Switchview
™
Throw Lever
Make magnification adjustments smooth and easy by attaching the
included Switchview™ Throw Lever.
Installation
1. Properly mount your riflescope and
have the Switchview™ ring, lever, screw,
wrench, and some lubricant available.
2. Find the center of travel on your
riflescope’s magnification adjustment ring
and place a small mark at this point as a
reference for positioning.
3. Apply one drop of lubricant to the ball of
the Switchview™ ring.
4. Slide the Switchview™ ring over the eyepiece and onto the
magnification ring. Gently spread the ring apart – just far enough to
get it over the eyepiece.
5. Carefully insert the ball of the Switchview™ ring into the socket of
the lever by GENTLY working the lever onto the lubricated ball.
NOTE: Precise tolerances ensure the ball and socket fit together
very tight.
6. Insert the Allen Screw through the unthreaded hole in the lever
and into the ring and tighten only until SNUG and the ring
doesn’t slip when rotated. If you use a torque wrench, tighten to
2.2 inch-pounds (in./lbs.). When properly installed, a gap will
remain between the two parts at the screw connection. Caution:
Do not over-tighten. Over-tightening may cause damage to the
Switchview™ and/or riflescope.
7. Test to ensure the Switchview™ lever is in the best position for you.
To adjust, simply loosen the screw and reposition the lever to a
more comfortable position. Then, retighten the screw and test the
new position.
Arc Measurements
Riflescopes will use one of two arc measurements: Milliradians (MRAD)
or Minute of Angle (MOA).
MRAD arc measurements are based on the concept of the radian.
There are 1,000 milliradians in a radian. A milliradian is always
1/1000th of any unit. So, 1 MRAD is 1m at 1000m, 1 yd. at 1000
yds., or 1 in. at 1000 inches. Most riflescopes using MRAD turrets
will adjust in 1/10 MRAD increments. Adjustments can be felt by
mechanical “clicks,” which subtend .10 units for each 100 units of
distance (e.g. 0.1 yd. or 0.36" at 100 yds.; 0.2 yd. or 0.72" at 200
yds.; or 1cm at 100m, 2cm at 200m).
MOA arc measurements are based on the concept of degrees and
minutes in a circle. There are 360° in a circle, and 60 minutes in a
degree. One MOA will always subtend 1.05" for each 100 yds. of
distance. In other words, if a rifle and scope were zeroed at 100 yds.
and the target is moved out to 200 yds., the bullet’s impact will be 1.05"
(1 MOA) lower on the target at 200 yds. Most riflescopes using MOA
turrets will adjust in 1/4-minute increments. Adjustments can be felt by
mechanical “clicks,” which subtend .26" for each 100 yds. of distance.
NOTE: These measurements are often rounded down to 1 MOA equaling
1" at 100 yds., and each adjustment (each mechanical click) equaling
1/4" at 100 yds.
Bullet Drop
1 Radian
1,000 MRAD
(MRAD)
MRAD
1 Degrees
60 MOA
(MOA)
MOA