PVS-14 J-Arms & Thermal Monocular Mounts

Connect a compatible night vision or thermal monocular to your helmet-mounted system with a professional PVS-14 J-arm. This collection includes articulating dovetail arms, traditional bayonet J-arms and specialised mounting arms for thermal monoculars using dovetail or mini-rail interfaces.

A J-arm forms the connection between the monocular and the NVG helmet mount. Both sides of the arm must be compatible: the device-side interface must match the monocular, while the helmet-mount interface must match the selected dovetail or bayonet mount.

Choose the Right Night Vision J-Arm

PVS-14 Dovetail J-Arms

Dovetail J-arms connect compatible PVS-14-style monoculars to dovetail helmet mounts such as the Wilcox G24, Argus G24-style mounts and compatible Norotos systems. They generally provide a more compact interface than traditional bayonet arms and are available with articulation, swing-away movement and left- or right-eye positioning.

The Tier None Articulating PVS-14 J-Arm offers an adjustable friction system and compatibility with standard dovetail helmet mounts. It is designed for the PVS-14 and similar monoculars using a compatible attachment point.

The Noisefighters AX14-PRO is a lightweight polymer J-arm for compatible PVS-14-style monoculars. Its rotating knuckle allows the device to swing away from the eye or stow closer to the helmet, while the dovetail interface connects to a compatible helmet mount.

For users who prefer an all-metal construction, the Noisefighters MAX14 uses a 7075-T6 aluminium structure and supports compatible PVS-14 monoculars and the Nocturn Industries Tanto with the supplied adapter.

PVS-14 Bayonet J-Arms

The PVS-14 Bayonet J-Arm connects compatible monoculars to legacy bayonet-style helmet mounts such as the USGI Rhino mount. A bayonet J-arm will not connect directly to a dovetail-only helmet mount.

Confirm the helmet-mount interface before ordering. Changing from a bayonet system to a dovetail system normally requires replacing both the J-arm and the helmet mount.

Thermal Monocular J-Arms

Dovetail Thermal J-Arms

The Noisefighters DMAX14 is an all-metal J-arm for compatible thermal monoculars that already have a supported device-side dovetail. Published examples include selected InfiRay RH25 and Trijicon SkeetIR configurations.

The DMAX14 connects to a dovetail helmet mount and includes a rotating knuckle for swing-away and close-to-helmet storage. It is not compatible with bayonet helmet mounts.

Mini-Rail and MUM-Rail J-Arms

Selected thermal and night vision monoculars use a mini-rail or MUM-rail interface instead of the threaded attachment found on many PVS-14-style devices.

The Noisefighters MRX-PRO is a lightweight articulating arm for compatible mini-rail devices, including selected FLIR Breach, InfiRay MH25, Sionyx OPSIN and MUM-14 configurations.

The Noisefighters RMAX14 provides an all-metal alternative for compatible mini-rail thermal and night vision monoculars. Verify the exact device generation because compatibility can differ between models carrying similar product names.

Dovetail, Bayonet or Mini-Rail?

Dovetail Helmet-Mount Interface

A dovetail interface is used by many modern NVG helmet mounts and articulating J-arms. The dovetail on the J-arm must fully engage and lock into the helmet mount before the device is used.

Bayonet Helmet-Mount Interface

Bayonet J-arms are designed for compatible Rhino-style and other bayonet helmet mounts. They are not interchangeable with dovetail arms without replacing or adapting the relevant mounting components.

Mini-Rail Device Interface

Mini-rail describes the attachment point on the monocular rather than the helmet-mount side of the arm. Products such as the MRX-PRO and RMAX14 connect a supported mini-rail device to a dovetail helmet mount.

Articulating Versus Fixed J-Arms

An articulating J-arm allows the monocular to move between the left and right eye, swing temporarily away from the viewing position or stow closer to the helmet. When comparing arms, review the articulation mechanism, adjustment range, material, weight, tether point and resistance to unwanted movement.

A simpler fixed or traditional arm can remain suitable for users who prioritise a basic connection and do not require extensive articulation. The correct choice depends on the device, helmet mount and intended configuration.

Check J-Arm Compatibility Before Ordering

Confirm the following specifications before selecting a J-arm:

• The exact night vision or thermal monocular model
• The device-side threaded, dovetail or mini-rail interface
• The helmet-mount-side dovetail or bayonet interface
• Left- and right-eye positioning
• Articulation and swing-away requirements
• Arm weight and material
• Fore-and-aft and interpupillary adjustment
• Tether or secondary-retention points
• Included screws, adapters and installation tools
• Automatic shut-off compatibility

Many aftermarket articulating J-arms do not provide an integrated automatic shut-off function. Manually switch off the monocular when it is raised or moved out of the viewing position unless the complete device-and-arm configuration specifically supports that feature.

Complete Your Helmet-Mounted Monocular Setup

A complete system requires a compatible helmet or head harness, helmet shroud, helmet mount, J-arm and monocular. Browse night vision monoculars or helmet-mountable thermal monoculars to match the arm to the device.

Users combining two devices should explore night vision and thermal bridges rather than using two independent J-arms. Browse the complete NVG mounting collection for mounts, shrouds, arms, bridges and adapters.

Read our guide to mounting night vision and thermal devices on a helmet for a complete explanation of the mounting chain and interface types.