Arex Delta Gen.2 OR Plates

• Optics-ready flexibility: These plates let an Arex Delta Gen.2 accept several popular red dot footprints, making it easier to match the pistol to a preferred carry, duty or range optic.
• Footprint-specific fit: Support for standards such as Trijicon RMR, Shield RMS and Leupold DeltaPoint Pro helps provide the correct interface instead of relying on improvised solutions.
• Simple conversion path: Interchangeable adapter plates make it practical to change sight standards later, which is useful when upgrading optics or standardising multiple handguns.
• Made in Slovenia: Manufacture in Slovenia aligns these plates with the origin of the Delta pistol platform and supports consistent fit for the intended handgun system.
• 2-year warranty: A defined 2-year warranty period gives clear coverage terms for an accessory that is central to secure red dot mounting.

About the Arex Delta Series

The Arex Delta series is the company’s modern striker-fired pistol family, developed for users who want a practical defensive handgun with contemporary features and straightforward handling. Within the AREX lineup, the Delta models sit alongside the company’s other pistol platforms as lighter, polymer-framed handguns intended for everyday carry, professional sidearm use and regular training. A key part of the series is its emphasis on modularity, especially in Delta Gen.2 versions with optics-ready slides that accept interchangeable mounting plates.

That approach makes the Delta series relevant to current handgun use, where compact and full-size pistols are increasingly paired with miniature red dot sights for faster target acquisition and clearer aiming under stress. The family is built around practical ergonomics, durable construction and compatibility with established sight standards rather than proprietary dead ends. For shooters moving from iron sights to pistol optics, the Delta platform offers a direct route into red-dot-equipped carry or training setups. In that sense, the series is defined less by one single feature than by a balanced design philosophy: a service-style handgun platform that remains adaptable as sighting preferences change.

About the Arex Delta Gen.2 OR Plates

The Arex Delta Gen.2 OR Plates are the interface parts that turn an Arex Delta Gen.2 optics-ready pistol into a genuinely adaptable red dot platform. Rather than locking the handgun into one mounting pattern, these plates allow the slide to accept several widely used standards, including Docter, Trijicon RMR, Holosun 407K/507K, Shield RMS, Leupold DeltaPoint Pro and C-More RTS. That broad compatibility matters in practice because pistol red dots vary not only in footprint, but also in window size, intended role and overall carry profile.

For a concealed-carry setup, a lower-profile footprint can help keep the pistol compact, while a larger sight standard may suit range use or a duty-oriented configuration where a bigger viewing window is preferred. By using dedicated plates for these mounting standards, the system gives the shooter a cleaner way to match the optic to the job and to change direction later without replacing the handgun itself. This also makes the plates useful for owners who already have red dots from different brands and want to keep the Delta Gen.2 compatible with existing equipment.

As a category, adapter plates are small parts, but they have an outsized effect on reliability and fit. On an optics-ready handgun, the plate is the foundation between slide and sight, so choosing the correct standard is essential for proper installation and long-term use. These AREX plates are therefore best understood as a practical conversion component for building a red-dot-ready Delta around the optic footprint that makes the most sense for the application.

About Arex

AREX was founded in 1994 by Ivan Kralj and grew from a tool-industry business into a defence-sector manufacturer. Based in Šentjernej, Slovenia, the company produces self-loading pistols, firearm components, barrels and training ammunition, giving it direct expertise in the mechanical and manufacturing side of handgun design. Its pistol range includes the REX ZERO 1 and DELTA families, with the Delta line reflecting the company’s move into modern striker-fired handguns.

AREX also manufactures ammunition links and ballistic-protection products, which places the brand within a broader defence-production environment rather than a narrow sporting niche. Since 2017, when RSBC acquired AREX, the company has continued to develop its firearms and related systems. For products such as optics-ready pistol plates, that background matters because the same manufacturer behind the handgun platform also develops the mounting solution intended to fit it.

Main Features

• Manufacturer: Arex
• Product type: Adapter plates
• Compatibility below: Arex Delta Gen2
• Compatibility above: Docter Mounting Standard
• Compatibility above: Trijicon RMR Mounting Standard
• Compatibility above: Holosun 407K/507K Mounting Standard
• Compatibility above: Shield RMS Mounting Standard
• Compatibility above: Leupold DeltaPoint Pro Mounting Standard
• Compatibility above: C-More RTS Mounting Standard
• Made in: Slovenia
• Warranty: 2 years

Warranty

The Arex Delta Gen.2 OR Plates are covered by a 2-year warranty.