Fulton Armory's M1A HUB Mount Solves Threads, Not Gas or Sights
Fulton Armory has a $89.95 answer to the M1A/M14's long-standing suppressor problem: an adapter that converts the rifle's oddball .595×32 muzzle threads to the common 1.375×24 HUB interface, according to a review from GarandThumb.
Snapshot
The review, published on garandthumb.com, breaks down the Fulton Armory M1A/M14 HUB Mount as a specs-based look rather than a live-fire test. It covers which rifles fit, what gets removed in the process, and the gas-system and front-sight issues owners still have to solve on their own.
Key points
- Fitment: the mount works on 18.5-inch and 22-inch M1A/M14 barrels, and also fits 18-inch models, though those require pulling the adapter off to clean the gas piston.
- Build: it's hardened 4140 steel with a nitride finish, priced at $89.95 with an optional $12.95 install wrench.
- Front sight tradeoff: removing the traditional flash suppressor assembly to install the mount can eliminate the rifle's front-sight mounting point, which the article says needs a separate gas-lock sight base if iron sights matter.
- Gas system isn't solved: the review stresses that HUB threading doesn't fix M1A backpressure issues, and owners may still need an adjustable gas plug or low-backpressure suppressor to avoid hammering the op rod.
- Alignment check required: GarandThumb's piece says every installation should be verified with an alignment rod before firing, since thread or shimming issues on this platform can cause baffle strikes.
Quick take
GarandThumb frames this as a well-made thread adapter, not a complete suppressor conversion. It's most useful for owners who already have a HUB-compatible can, understand the M1A's gas quirks, and have a front-sight plan sorted out before ordering.
Read the full story: garandthumb.com