Primary Arms SLX Offset Reflex Mount Keeper

The Primary Arms SLX Offset Reflex Mount Keeper (brand part no. 910099) is a retention component for the SLX offset mount system, keeping a compatible reflex sight securely seated at its offset position on an AR-platform rifle or pistol. It’s built to work alongside Primary Arms’ offset mounting hardware rather than as a standalone mount, so it’s aimed at shooters who already run an SLX offset setup and need this piece for a complete, secure installation. The keeper is a small, purpose-built part rather than a full mount body, which keeps replacement or setup straightforward. Offset reflex sight setups let shooters run a magnified primary optic while keeping a fast, unmagnified backup sight available at an angle.

Key Specifications

• SLX offset mount system compatibility, securing a reflex sight in its offset position.
• Retention keeper component, sold for use with Primary Arms offset mounting hardware.

Frequently Asked Questions

Does this work as a standalone mount? No — it’s a retention component built to work with the SLX offset mount system.

What is an offset reflex sight setup used for? It lets a shooter run a magnified primary optic while keeping a fast, unmagnified sight available at an angle.

Buy the Primary Arms SLX Offset Reflex Mount Keeper

Order it from our Lubbock, Texas gun shop for fast, insured shipping — it’s a direct accessory purchase with no FFL required. Check out our full scope accessories and scope parts selection for compatible offset mounting hardware.