Fulton Armory's HUB Mount Solves M1A Thread Woes, Adds New Hurdles
Fulton Armory now sells an $89.95 adapter that converts the M1A/M14's oddball .595×32 muzzle threads to the increasingly common 1.375x24 HUB suppressor interface, according to a review at GarandThumb.com.
Snapshot
The review looks at Fulton Armory's new HUB mount for M1A and M14-pattern rifles, covering its specs, fitment across barrel lengths, and the front-sight and gas-system complications that come with suppressing this platform. The piece treats the adapter as a well-made thread solution rather than a complete suppressor-ready conversion.
Key points
- Specs: The hardened 4140 steel, nitride-finished mount (Fulton part FA-M-186) threads onto .595×32 and presents a 1.375x24 HUB interface for the suppressor.
- Fitment: It fits 18.5-inch and 22-inch barrels directly; 18-inch models work too, but Fulton says the mount must be removed to access and clean the gas piston.
- Front sight loss: Removing the traditional flash-suppressor assembly to install the mount can eliminate the rifle's front-sight mounting point, requiring a separate gas-lock front-sight base if iron sights matter.
- Gas system risk: The review notes the M1A lacks a simple external gas adjustment, and added suppressor backpressure can mean harder extraction and more wear on the operating rod.
- Alignment check required: Every installation should be verified with an alignment rod, since misaligned threads or a loose adapter can cause a baffle strike.
Quick take
For an owner who already has a HUB-compatible suppressor and a plan for the front sight, this looks like a reasonably priced fix to a decades-old thread problem. It is not a drop-on solution; the gas system, sight setup and alignment still need attention before anyone pulls the trigger suppressed.
Read the full story: garandthumb.com