NcSTAR STH432G User Manual

MARK III TACTICAL SERIES

Model: STH432G

INSTRUCTIONS

MARK III TACTICAL SERIES

Model: STH432G

The Mark III Tactical Scope STH432G offers a compact optical system packed with many features
making it very user friendly. A Quick Release mounting system makes for quick and easy mounting
and removal. The scope is also backed by our Lifetime Limited Warranty. We trust that you will
receive many years of enjoyment and service from your new Mark III Tactical Scope.

For optimum performance, please follow all of the procedures in this owner’s manual very carefully.

KEY FEATURES

 CAUTION: BE SURE THAT YOUR FIREARM IS UNLOADED AND POINTED IN A SAFE

DIRECTION. PRACTICE SAFE FIREARM HANDLING PROCEDURES AT ALL TIMES.

 CAUTION: CAREFULLY FOLLOW ALL OF THE MOUNTING PROCEDURES. FAILURE

TO DO SO CAN CAUSE DAMAGE TO YOUR SCOPE OR FIREARM

MOUNTING PROCEDURE

Your scope mount is the link between your firearm and your optics. It is very important to have a
solid connection between the two, in order to ensure proper function of all the components. NcSTAR
has made installation quick and easy for the Mark III Tactical Scope by incorporating the Quick
Release Mounting system. You should place your firearm on a secure platform, such as a gun vise,
before performing any of the following procedures.

MOUNTING SCOPE TO A WEAVER/PICATINNY RAIL

1. To perform this action, move the Quick Release Lever to the Closed position pointing towards

the Ocular Lens/ Eyepiece (Fig. 1). Begin by loosening the Locking Nut on the left side of the
mount. Using a wrench, turn the Locking Hex Nut Counter-Clockwise (Fig. 2).

2. Next, turn the Quick Release Lever to the Open position pointing towards the Objective Lens.

Using a flat blade screwdriver, loosen the Slotted Set Screw in order to fit the mounting unit to
the rail on your firearm (Fig. 2). Seat the scope on top of your firearm’s optics rail with the
Objective Lens pointing towards the muzzle of the firearm. Shoulder the firearm and adjust
the position of the scope on the optics rail until you have achieved the proper eye relief and
maximum field of view through the scope. Once you have your scope positioned properly,
close the Quick Release Lever. Now, tighten the Slotted Set Screw until it is snug using a flat
blade screwdriver.

3. At this point your scope and mount are in place, but they are not yet anchored to the firearm

solidly. Open the Quick Release Lever and make small adjustments to the Slotted Set Screw.
Open and Close the Quick Release Lever checking the tightness of the mount. Perform this
action as many times as necessary until the mount is set firmly atop the rail.

 CAUTION: IT DOES NOT TAKE A LOT OF FORCE TO GET THIS UNIT MOUNTED

SECURELY. BE CERTAIN NOT TO OVER TIGHTEN THE SLOTTED SET SCREW TO
AVOID STRIPPING THE THREADS. DAMAGE CAN ALSO OCCUR TO QUICK
RELEASE LEVER IF TOO MUCH FORCE IS APPLIED.

4. Once you have properly tightened the Slotted Set Screw and checked the rail tension of the

mount connection by opening and closing the Quick Release Lever, you can now tighten the
Locking Hex Nut to secure the adjustments you have made. Tighten the Locking Hex Nut with
the Quick release lever in the closed position for best results. Be sure not to over tighten the
Locking Hex Nut to avoid stripping it. You have now successfully mounted your scope. By
simply opening the Quick Release lever and pivoting the scope in the direction of the locking
nut, you can easily remove the scope from your firearm. Make a reference as to the position
of the scope and mount in relation to the rail so that eye relief settings may be retained.