Primary Arms SLx FS Flip-to-Side Magnifier Mount

• Flip-to-side action: The mount swings the magnifier out of the sightline when magnification is not needed, so a red dot or 1x prism can be used at full speed for close-range shooting.
• 2-bolt magnifier interface: Built for Primary Arms and other compatible magnifiers with a 2-bolt bottom pattern, it gives a direct, secure attachment without unnecessary adapters.
• Selectable co-witness height: The design places the magnifier at either Absolute or Lower 1/3rd co-witness, making it easier to match the mount to different red dot setups.
• 6061-T6 aluminum body: The aluminum construction keeps weight manageable while providing the rigidity needed to hold alignment during regular range use and field handling.
• Steel alloy crossbolt: A robust crossbolt system helps the mount stay firmly locked to the rail, which matters when the magnifier is being flipped in and out repeatedly.

About the Primary Arms Mounts Series

Primary Arms Mounts covers a broad range of optic-mounting solutions for shooters who want practical compatibility across different sighting systems. The series includes mounts for scopes, magnifiers, and red-dot optics, along with scope rings and risers, so it serves everything from compact carbine builds to more specialized rifle setups. Within the lineup, Primary Arms offers CLx, SLx, GLx, and PLx variants, reflecting different product tiers and use cases.

A defining trait of the series is its focus on common mounting standards and real-world fitment. The catalog includes options for M1913 Picatinny platforms, multiple optic tube sizes, and dedicated solutions for magnifiers that need to move quickly between in-line and offset positions. That makes the series especially relevant for modern sporting rifles and tactical optics setups where modularity matters. Across the range, the design philosophy is straightforward: durable materials, simple attachment methods, and configurations that help the optic sit at the right height for the intended sight picture.

About the Primary Arms SLx FS Flip-to-Side Magnifier Mount

The Primary Arms SLx FS Flip-to-Side Magnifier Mount is built for shooters who want to add magnification behind a red dot or 1x MicroPrism without giving up the speed of a non-magnified sight. In practice, that means the magnifier can stay aligned behind the primary optic for target identification at distance, then be moved aside when the priority shifts to fast, close-range engagement. This makes the mount a natural fit for AR-pattern carbines and similar rifles used for range training, general-purpose shooting, or duty-style configurations.

Its 2-bolt bottom interface is intended for compatible Primary Arms magnifiers and similar models, giving the setup a direct and stable connection. The mount is also configurable for Absolute or Lower 1/3rd co-witness, which is important when pairing it with different red dot heights. That flexibility helps maintain a cleaner sight picture and more natural head position instead of forcing the shooter into a compromised cheek weld.

The body is made from 6061-T6 aluminum with a black finish, balancing low weight with the stiffness needed for repeatable alignment. A steel alloy crossbolt secures the mount to the rail and is designed to handle repeated flipping and regular handling without loosening easily. At 120.00 g, it adds useful capability without making the rifle feel unnecessarily heavy around the receiver area.

About Primary Arms

Primary Arms Optics was founded in 2008 and is headquartered in Houston, Texas. The company focuses on optics and related equipment for rifle and carbine platforms, with a catalog that includes rifle scopes, prism scopes, red dot sights, mounts, and accessories. In addition to product design and manufacturing, Primary Arms also operates e-commerce, wholesale distribution, and government sales divisions.

Within its optics lineup, Primary Arms organizes products into PLx, GLx, SLx, and CLx families, giving shooters clear tiers for different budgets and applications. The company is especially known for the ACSS reticle system, a proprietary reticle concept developed to combine aiming, ranging, and hold references in a more efficient layout. It also uses technologies such as AutoLive motion-sensing illumination in relevant optic categories, reflecting a practical approach to field use and battery management.

Main Features

• Manufacturer: Primary Arms
• Mount series: Primary Arms Mounts
• Made in: China
• Material: Aluminium
• Color: Black
• Weight: 120.00 g
• BH height: 20.00 mm
• H height: 44.45 mm
• Extension (KR): 0 MOA
• Inclination: 0 MOA
• Offset angle: 0°
• Bubble level: No

Warranty

2 years. This magnifier mount is covered by a two-year warranty.