NcSTAR STM3942GV2 - Manual (Page 3)

MOUNTING THE OPTIC:
Figure 1 Figure 2
This Optic is equipped with a Quick Release Weaver & Picatinny type rail Mount with an auto
Locking Latch. You should place your firearm on a secure platform, such as a gun vise, before
performing any of the following procedures.
To attach the Optic to a Weaver or Picatinny type rails, move the Locking Latch located within
the Quick Release Lever away from the lever pivot point (to unlock the lever) and then swing the
Quick Release Lever to the forward (Open) position. Place the Optic onto the rail, with the Recoil Lug
placed into one of the cross slots on the rail. Swing the Quick Release Lever rearward (Closed)
position to secure the Optic onto the rail.
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 a consistent zero and proper function of
all the components.
ADJUSTING THE RAIL TENSION OF THE MOUNT:
If the scope’s mount does not fit your firearms rail securely, you can adjust the rail tension of the
mount by following these instructions:
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, Slide the Locking Latch away from the lever pivot point and swing 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 mount onto the rail of your
firearm. 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.