If installing a scope mount is new to you, here are the instructions. For installation, it’s also good to have some sort of aid to keep the rifle in place, such as a bench vise and for AR rifles, a device like the Magpul BEV Block.

Tools Required

• T15 Torx tool
• T25 Torx tool or a large flathead screwdriver (we recommend a Torx tool)(The manufacturer's instructions mention a 5/32-inch hex key, but that is incorrect)
• (The manufacturer's instructions mention a 5/32-inch hex key, but that is incorrect)
• Recommended: Torque wrench for small torques (e.g., 0-70 in-lbs / 0-8 Nm)

Mount Installation

• You'll need the T25 Torx tool and torque wrench for this step
• Place the mount in the position on the Picatinny rail that's suitable for your eye relief
  Typically on AR rifles, the ocular lens of the scope should be quite near the rear edge of the upper receiver
  Both clamps of the scope mount should attach to the upper receiver's fixed Picatinny rail, not the handguard rail
• Typically on AR rifles, the ocular lens of the scope should be quite near the rear edge of the upper receiver
• Both clamps of the scope mount should attach to the upper receiver's fixed Picatinny rail, not the handguard rail
• Press the mount downward and forward, then lightly tighten the front clamp followed by the rear
• Finally, torque the front clamp to 45 in-lbs / 5.1 Nm and then the rear

Scope Ring Installation

• You'll need the T15 Torx tool and torque wrench for this step
• Remove both scope top ring caps – don't lose the screwsPerform this step somewhere other than above a drain, full trash can, or similar (we have been there)
• Perform this step somewhere other than above a drain, full trash can, or similar (we have been there)
• Place the scope in the mount in a preferred position and reinstall the ring caps, then lightly tighten the screws so the scope can still move in the mount
• Position the scope for proper eye relief without any sideways cant
  At this point, it's a good idea to ensure the scope is actually horizontally level – for proper scope adjustments and especially if you plan to shoot at longer distances, e.g., with a ballistic reticle
  There are several methods for checking scope cant, which may require aids such as bubble levels, a flashlight, string, etc. – you can also research this topic online with a suitable search phrase like "how to level a scope"
  One method is to draw a straight line on a target (or such) with a bubble level, then align the rifle's receiver straight using a small bubble level, and finally align the scope's reticle parallel to the line on the target
• At this point, it's a good idea to ensure the scope is actually horizontally level – for proper scope adjustments and especially if you plan to shoot at longer distances, e.g., with a ballistic reticle
• There are several methods for checking scope cant, which may require aids such as bubble levels, a flashlight, string, etc. – you can also research this topic online with a suitable search phrase like "how to level a scope"
• One method is to draw a straight line on a target (or such) with a bubble level, then align the rifle's receiver straight using a small bubble level, and finally align the scope's reticle parallel to the line on the target
• When the scope is properly positioned, lightly tighten the scope ring screws in an X-pattern (e.g., front-left, rear-right, rear-left, front-right)
• Finally, torque the screws in the same X-pattern to 15 in-lbs / 1.7 Nm