Primary Arms SLx Top Cap Reflex Mount, 34mm

• 12 o’clock reflex position: Places a compatible mini reflex sight directly above the scope, giving a fast transition to a close-range aiming point without changing the rifle’s overall width.
• 34 mm scope-mount fit: Built specifically for 34 mm SLx scope mounts, so it integrates cleanly with the host mount and keeps the auxiliary sight centered over the bore.
• Holosun 507c-style footprint: Supports the Primary Arms Classic Series 24mm Mini Reflex Sight and other optics that share the same footprint, making it easier to build a compact piggyback setup.
• 6061 aluminum construction: Keeps weight low while providing the rigidity needed to hold zero under regular field and range use.
• 2.04 in. sight-base height on 1.5 in. SLx mounts: Creates a practical head-up presentation that helps the shooter pick up the dot quickly for short-range targets.

About the Primary Arms Mounts Series

Primary Arms Mounts covers a broad range of support hardware for modern optics, from scope mounts and rings to magnifier mounts, risers, and red-dot mounting solutions. Within the wider Primary Arms lineup, these mounts are designed to complement the company’s optics families and to give shooters a consistent way to configure rifles for hunting optics, tactical optics, and general-purpose range use. The series includes options for 1-inch, 30mm, and 34mm tubes, along with models built around common interfaces used for compact reflex sights and magnifiers.

A defining trait of the series is its practical, modular approach. Some models focus on straightforward fixed mounting, while others add features such as flip-to-side magnifier operation, thumb-screw or cross-bolt attachment, and dedicated risers for compact optics. That variety lets the mount family support everything from simple red-dot setups to more layered rifle configurations with a primary scope and a secondary sight. Across the range, the design philosophy stays focused on secure fit, sensible geometry, and compatibility with the optics shooters are most likely to pair together.

About the Primary Arms SLx Top Cap Reflex Mount, 34mm

The Primary Arms SLx Top Cap Reflex Mount, 34mm is a compact accessory for shooters who want to add a secondary aiming system to a scoped rifle without moving to a side-offset arrangement. By positioning a compatible reflex sight at the 12 o’clock position, it supports a fast shift from the magnified optic to a close-range dot sight. That layout is especially useful on rifles set up for mixed distances, where a magnified scope handles medium-range work and the piggyback dot covers fast, short-range engagements.

This mount is made for 34 mm scope tubes and uses a Trijicon RMR-pattern interface, which in this case also fits the Holosun 507c-style footprint used by the Primary Arms Classic Series 24mm Mini Reflex Sight and similar optics. Keeping the reflex sight centered over the rifle helps preserve a natural presentation and avoids adding lateral bulk that can come with offset solutions. On compatible 1.5 in. SLx 34 mm mounts, the reflex sight base sits at 2.04 in., creating a head-up sight picture that can be accessed with a simple lift of the head rather than a major change in shooting position.

With its 6061 aluminum construction, black finish, and low 30.00 g weight, the mount adds useful capability without making the rifle noticeably heavier. The 0 MOA inclination and 0° offset angle underline its purpose: a straightforward top-mounted reflex platform for a clean, centered backup or transitional sight setup.

About Primary Arms

Primary Arms Optics was founded in 2008 and is headquartered in Houston, Texas, United States. The company focuses on designing and manufacturing optics and related accessories, with a catalog that includes rifle scopes, prism scopes, red dot sights, mounts, and accessories. Beyond optics design, Primary Arms also operates e-commerce, wholesale distribution, and government sales divisions, giving it a broad presence in the shooting and tactical equipment market.

Within the optics category, Primary Arms is especially known for the ACSS reticle system, one of its signature technologies, as well as features such as AutoLive motion-sensing illumination on selected optics. Its product families include PLx, GLx, SLx, and CLx, which helps organize products by intended role and feature level. That mix of optics development and mounting solutions makes the brand particularly relevant for shooters building complete rifle sighting systems around compatible components.

Main Features

• Manufacturer: Primary Arms
• Mount series: Primary Arms Mounts
• Made in: China
• Mounting standard: Trijicon RMR
• Scope / sight type: 34 mm
• Tube diameter: 34
• BH height: 35.00 mm
• H height: 52.00 mm
• Extension (KR): KR 0.0 mm
• Inclination: 0 MOA
• Offset angle: 0°
• Bubble level: No
• Material: Aluminium
• Color: Black
• Weight: 30.00 g

Warranty

Primary Arms states a 2-year warranty for this mount. That period matches the product’s stated coverage and provides defined support for normal ownership and use.