ATN Scope Mount for Weaver/Picatinny: Setup Guide

By Precision Optique | Published: 2026-10-28

Category: How-to Guides

Learn how to install an ATN scope mount on a Weaver/Picatinny rail. Step-by-step guide with common mistakes and a quick-release option.

Quick Answer

To install an ATN scope on a Weaver/Picatinny rail, use a compatible quick-release mount like the INNOMOUNT QD, align the recoil lug, and torque the lever to spec. Follow the steps below for a secure, repeatable setup.

Why a Dedicated Mount Matters

ATN scopes like the Thor, Mars, and X-Sight series have specific mounting requirements. A dedicated mount ensures proper eye relief, clearance for the controls, and a solid connection to the rifle.

A quick-release mount (QD) lets you swap optics without losing zero, which is useful if you share a rifle or use different scopes for different conditions.

Trade-Off: Fixed vs. Quick-Release

Fixed mounts are lighter and often cheaper, but they require tools to remove the scope. Quick-release mounts add a little weight and cost, but they offer convenience and repeatability.

For most shooters, a QD mount is worth the extra expense because it allows you to switch between day and night optics or return to iron sights in seconds.

Step-by-Step Installation Guide

Prepare the Rifle and Mount: Ensure the rifle is unloaded. Clean the Weaver/Picatinny rail with a solvent to remove oil or debris. Check that the mount's recoil lug matches the rail slot. A dirty rail can cause the mount to shift under recoil.
Position the Mount on the Rail: Slide the mount onto the rail from the rear, aligning the recoil lug with a slot. Position the mount to achieve the desired eye relief for your ATN scope. Place the mount so the scope's eyepiece is about 3-4 inches from your eye when in shooting position.
Tighten the Quick-Release Lever: Close the lever firmly. The lever should require moderate force to close; if it is too loose, adjust the tension nut on the mount. If too tight, loosen it slightly. The lever should be snug but not require excessive force; if it does, adjust the tension nut.
Attach the ATN Scope: Place the scope into the mount rings. Tighten the ring screws evenly using a torque wrench to the manufacturer's specification (typically 15-18 in-lb). Uneven tightening can cause scope misalignment.
Verify Alignment and Function: Look through the scope and check for proper eye relief and a level reticle. Cycle the bolt or dry-fire to ensure no interference. If needed, re-adjust the mount position and repeat steps 3-4. Always confirm the mount is secure before heading to the range.

Product Spotlight

Montage Viseurs ATN pour Weaver/Picatinny: The INNOMOUNT QD is a quick-release mount for ATN scopes (Thor, Mars, X-Sight I+II) that fits rifles with a Weaver/Picatinny rail. It provides a secure, repeatable mounting solution that helps maintain zero when you remove and reattach the scope.
Montage Viseurs ATN pour Weaver/Picatinny