2014Arms forum
Compatibility and modifications of PRO Arms with back-mounted vests
12 years old. Gear and prices may have changed since.
What the thread found
- The PRO manual specifies that arm socket block orientation is critical and should never be mounted with weight applied parallel to the axis, which occurs when using back-mounted vests.
- The weak point common to all arms is the heim joint and rod-end bearings that adjust socket block angle.
- A solid block adapter designed to replace the adjustable rod-end assembly provides a more robust solution for back-mounted configurations.
- The solid block adapter eliminates the standard front-mount adjustment capability but provides greater rigidity for back-mounted use.
- MK-V produces an adapter block that removes the screws and serves as a reinforcement option for back-mounted systems.
- The manufacturer recommends periodic replacement of rod-end bearings, particularly for back-mounted installations.
Depends on
- The solid block adapter prevents use of standard front-mount adjustments.
- Availability of the MK-V solid block adapter was uncertain at the time of discussion, with extended lead times reported.
- The discussion references specific aftermarket solutions whose current availability is unknown.
- Modifications may be required for compatibility with specific vest brands beyond the adapter itself.