Fulton Armory's M1A HUB Mount Fixes Threads, Not Everything Else

Fulton Armory now sells a $89.95 adapter that takes the M1A/M14's oddball .595x32 muzzle threads and converts them to the common 1.375x24 HUB interface, giving owners a direct path to mainstream suppressors instead of stacking adapters on a rifle designed before the modern suppressor market existed.

Snapshot

GarandThumb reviews the Fulton Armory M1A/M14 HUB Mount as a specifications-based look at fitment and installation rather than a range test. The adapter fits 18.5- and 22-inch barrels outright, and 18-inch models with the caveat that it must come off for gas-piston cleaning. The site's main point: it solves the thread problem but not every problem that comes with suppressing this platform.

Key points

• Specs: Hardened 4140 steel with a nitride finish, rifle-side .595x32 threading, suppressor-side 1.375x24 HUB, plus an optional $12.95 install wrench.
• Front sight gets removed: Installing the mount typically displaces the factory front-sight assembly, so owners relying on irons need a separate gas-lock sight base, which isn't included.
• Gas system isn't automatically fixed: GarandThumb notes the M1A lacks a simple external gas adjustment, and added suppressor backpressure can mean harder extraction and more wear unless owners address it separately.
• Alignment still has to be checked: The article stresses verifying bore alignment with a proper rod after install, since threads, shims, or a previously modified muzzle can throw things off.
• Maintenance tradeoff on 18-inch guns: Fulton states the mount must be removed for gas-piston cleaning on that barrel length, meaning repeated reinstalls and re-checks.

Quick take

GarandThumb calls this a well-designed thread adapter rather than a complete suppressor conversion, and that framing seems right. For $90 it clears the single biggest obstacle to running a modern HUB suppressor on an M14-pattern rifle, but buyers still need a plan for sights, gas management, and alignment before they pull the trigger.

Read the full story: garandthumb.com