What Is a HUB Mount? The 1.375x24 Suppressor Standard Explained

A HUB mount is a standardized 1.375 x 24 thread pitch machined into the rear of a suppressor body, allowing that single suppressor to accept multiple mounting interfaces from different manufacturers. HUB stands for Hybrid Universal Base.

In practical terms, it's the suppressor industry's version of a USB port: one standard physical connection that lets you plug in whatever mounting type your specific rifle and use case requires (direct thread, taper QD, cam-lock QD, pistol booster, or specialty adapters).

The HUB standard exists because the pre-HUB suppressor market was a compatibility nightmare. SilencerCo had ASR. AAC had 51T. Surefire had SOCOM. Dead Air had KeyMo. Each brand's suppressors only worked with that brand's muzzle devices and mounts. Buying a new can locked you into an entire ecosystem.

HUB ended that. As of 2026, almost every new rifle suppressor from major US manufacturers ships HUB-compatible, which means a single 1.375 x 24 thread accepts mounts from a dozen different brands.

This blog will explain how the HUB standard actually works, the thread spec engineering behind why 1.375 x 24 was chosen, which suppressors and mounts are HUB-compatible today, and the situations where HUB isn't the right answer. Method Dynamics makes HUB-compatible suppressor accessories, but this post is meant as an honest technical explainer first.

The Thread Spec: Why 1.375 x 24 Specifically

The HUB standard uses 1.375-inch outer diameter threads with 24 threads per inch (TPI), expressed as 1.375 x 24 or sometimes 1 3/8 x 24. Both refer to the same thread pattern. The 24 TPI is a fine thread pitch, which matters for a few reasons:

Fine threads (24 TPI) hold position better under recoil than coarse threads. A fine thread engages more material per unit of axial travel, which distributes load across more thread surface. For a suppressor sitting at the end of a barrel, taking thousands of high-pressure cycles, fine threads resist loosening better than the coarse equivalent.

1.375-inch diameter provides enough wall thickness to thread inside a suppressor body without compromising the can's structural integrity. Smaller suppressor bodies (typically 1.5 to 1.75 inches outer diameter) need an internal thread that leaves enough material for strength. A 1.375 OD thread inside a 1.625 body leaves about 0.125 inches of wall, which is the minimum acceptable for hot, pressurized service.

The pitch matches existing suppressor adapter inventories. Before HUB was officially adopted, several manufacturers (notably Bravo Company and SilencerCo's earliest modular cans) were already using 1.375 x 24 for their proprietary adapters. When the industry wanted a universal standard, picking the thread spec that already had the widest adapter inventory made the adoption almost frictionless.

The standard typically uses Class 2A external threads (on the mount) and Class 2B internal threads (on the suppressor body). This gives a slight clearance fit that prevents galling under high temperatures while still maintaining concentric alignment. Premium manufacturers may machine to Class 3A/3B for tighter tolerances and improved precision repeatability.

How a HUB Suppressor Actually Works

The mechanical concept is straightforward. Inside the rear of a HUB-compatible suppressor, there's a section of 1.375 x 24 internal thread. The factory ships the can either bare (just the threads) or with a default mount pre-installed. You unscrew the default mount (if installed), screw in whichever HUB-compatible mount fits your application, and you're done.

That single 1.375 x 24 thread can accept:

• Direct thread adapters in 1/2 x 28 (5.56), 5/8 x 24 (.30 cal), 9/16 x 24 (6.5mm), 11/16 x 24, M14 x 1, M18 x 1.5, M13.5 x 1 LH (HK-style), or various pistol thread pitches.

• Taper-shoulder QD mounts from Dead Air (KeyMo), SilencerCo (ASR), Yankee Hill Machine (Phantom/sRx), Rugged (Dual Taper), Thunder Beast (CB), Griffin (Taper), Q (Cherry Bomb), and others.

• Cam-lock and bayonet QD mounts from Surefire (SOCOM HUB adapter), Knight's Armament, and several others.

• Pistol boosters for Nielsen device pistol applications.

• Specialty adapters for tri-lug, P-series, M13.5 LH (HK-pattern), and other niche interfaces.

This is the modularity that HUB unlocks. One suppressor can run on a 5.56 AR-15 with a direct thread mount today, swap to a 6.5 Creedmoor bolt rifle with a different direct thread mount next week, then convert to a Dead Air KeyMo taper QD for fast multi-host use the week after, without buying a new can.

For a deeper comparison of which mount type to actually choose once you have a HUB-compatible can, our direct thread vs QD guide covers the decision framework.

A Brief History: How HUB Became the Standard

HUB didn't emerge from a formal standards body the way Picatinny did (which is a literal military standard, MIL-STD-1913). HUB emerged from market adoption.

The 1.375 x 24 thread first appeared in the late 2000s on Bravo Company's suppressor adapters. SilencerCo adopted it in the mid-2010s for their modular cans. By 2018, Dead Air, Rugged, Yankee Hill Machine, and Q had all standardized on 1.375 x 24 for their newer rifle suppressors. SilencerCo published the spec publicly (no licensing fees, no proprietary restrictions), which let smaller manufacturers adopt it without any commercial barriers.

The catch is that there's no central authority enforcing the HUB standard. Each manufacturer self-certifies their cans as "HUB compatible." In practice, this works because the thread pitch is precisely defined and any half-decent CNC shop can hold the tolerances.

In edge cases, you'll occasionally find a HUB-labeled mount that doesn't thread cleanly into a HUB-labeled suppressor due to tolerance stacking. The fix is usually a few quarter-turns with a thread chaser, but it's worth being aware that "HUB compatible" isn't a certification, it's an industry consensus.

Which Suppressors Are HUB Compatible (2026)

The list below covers major US manufacturers' current HUB-compatible offerings as of 2026. This is a fast-moving space and new cans are released regularly, so always confirm with the manufacturer's published spec sheet before purchase.

Manufacturer	HUB-Compatible Models (Examples)	Notes
Dead Air	Nomad-Ti, Sandman series (current production), Primal, Wolfman (with adapter ring)	Most current rifle cans are HUB or HUB-adaptable
SilencerCo	Hybrid 46M, Omega 36M, Velos LBP, Scythe Ti, Harvester EVO	"Modular" line is HUB-compatible by default
Rugged	Razor 762, Surge 762, Mod22	HUB-compatible with Rugged's R.U.M. universal mount
Yankee Hill Machine	Turbo, R9, RKM	Phantom and sRx adapter systems use HUB
Q	Half Nelson, Full Nelson	Direct thread or HUB adapter
KGM Tactical	R6, R9, R30	HUB native
Diligent Defense	Enticer Ti, Bone	HUB native
Banish (Silencer Central)	Banish 30, Banish 45, Banish 223	HUB native, ships with default mount
Otter Creek Labs	Polonium-K, Hydrogen series	HUB native
Thunder Beast	Ultra series, Magnus series	HUB optional via CB adapter (taper mount is preferred for TBAC)

Suppressors that are NOT HUB-compatible typically include older cans (pre-2018), some Surefire SOCOM models (proprietary thread), the original AAC SDN series, and a handful of integrally suppressed barrels where the mount is permanent. If you're buying used, always verify before assuming HUB compatibility.

When HUB Is the Right Choice

HUB-compatible cans win in five scenarios.

1. First-time suppressor buyers. If this is your first can, HUB removes the biggest mistake new buyers make: picking a mounting type they later regret. Buy HUB, start with whichever mount fits your current rifle, and change later if needed. The ATF Form 4 tax stamp is the expensive part. The mount is replaceable for $50-$250.

2. Multi-host shooters. If you'll run one can on multiple rifles with different thread pitches, HUB is the cleanest solution. Buy direct thread adapters for each rifle, or buy a single taper QD muzzle device for each host. The can stays the same.

3. Future-proofing. Mount technology evolves. Five years ago, cam-lock QD was the best modular option. Today, taper-shoulder QD is. Five years from now, something else will probably win. A HUB can means you can adopt the next-generation mount when it arrives without buying a new suppressor.

4. Resale value. HUB-compatible cans hold value better in the used market because the buyer pool is larger. A proprietary-thread can is locked to its ecosystem. A HUB can fits anyone's setup.

5. Multi-caliber use. If your single can is rated for multiple calibers (a .30 cal can used on both 5.56 and 6.5 hosts, for example), HUB lets you use the appropriate thread pitch adapter for each caliber's host barrel without having to commit to one.

When HUB Isn't the Right Choice

HUB isn't universally better. Three honest downsides.

1. Some integrally suppressed designs don't benefit from HUB. Integrally suppressed bolt rifles, certain pistol designs, and rimfire setups are often built around a permanently mounted suppressor where modularity is irrelevant. For these, a fixed mount is just as good and sometimes lighter.

2. Premium proprietary mounts can be slightly better than HUB adapter equivalents. Surefire's SOCOM mounting system, when used with Surefire's SOCOM-mount cans, has specific QC and engagement features that are difficult to replicate through an adapter ring. If you're committed to a specific brand ecosystem (military or contract use, for example), HUB adapters may add a tolerance stack that the proprietary system avoids.

3. HUB adds a small amount of length and weight. The 1.375 x 24 thread section inside the suppressor takes up about 0.5 to 0.75 inches of internal volume that could otherwise be baffles or expansion chamber. Most modern cans absorb this in the design phase, but ultra-compact suppressors (sub-6-inch lengths) sometimes give up sound suppression performance to accommodate the HUB threads.

For most rifle suppressor buyers in 2026, these downsides are minor or irrelevant. HUB is the default answer.

Common HUB Mistakes

1. Cross-threading the HUB mount on installation. The 1.375 x 24 threads are fine and easy to cross-thread if you start the mount at an angle. Always start the thread by hand and back off if you feel any resistance in the first turn. A small amount of high-temperature anti-seize on the threads helps prevent galling and makes future removal easier.

2. Using the wrong torque on the HUB-to-can interface. Most HUB mount manufacturers spec 40-80 ft-lbs on the HUB-to-can connection. Hand-tight is not enough. The mount will work loose under recoil. Use a torque wrench, and re-check after the first 200 rounds.

3. Mixing brands without checking the actual fit. As noted above, HUB is a consensus standard, not a certification. A Dead Air mount usually fits a SilencerCo HUB can, but tolerances stack differently between brands. If you're mixing brands, buy from a retailer that accepts returns and verify the fit on a clean, room-temperature can before any range use.

4. Buying a non-HUB suppressor in 2026. Unless you have a specific reason (proprietary ecosystem commitment, integrally suppressed design, ultra-compact requirements), HUB is the default modern choice. Buying a non-HUB can today locks you into whatever mounting system that brand offers, forever, on that specific can.

5. Ignoring the muzzle device side of the equation. HUB only standardizes the suppressor's rear thread. The front end of the system, the muzzle device on your barrel, still varies by mount type. If you're running a Dead Air KeyMo mount on a HUB can, you also need a Dead Air KeyMo muzzle device on each rifle. The HUB compatibility doesn't extend to the muzzle device interface.

If you're building a suppressor-ready AR-15 and want to confirm your handguard has the right inner diameter to clear a HUB-mounted can, our free-float handguard line publishes ID specs on every model for exactly this reason.

What This Means for Your Build

The short version: HUB has become the de facto standard for rifle suppressor mounting in the US market. For new buyers in 2026, almost any can worth purchasing will be HUB-compatible. The decision is no longer "should I buy HUB?" but rather "which HUB-compatible mount type fits my application best?" That secondary question is where direct thread vs taper QD vs cam-lock QD comes back into play.

Method Dynamics offers HUB-compatible suppressor accessories for shooters building suppressor-ready ARs in the USA. All hardware is CNC-machined and held to tight tolerances so the HUB interface lines up the way the standard intends.

Method Dynamics is a US firearms accessory manufacturer combining 40+ years of engineering, design, and manufacturing experience from top-tier industry brands. Every Method Dynamics product is designed, prototyped, manufactured, and tested in the USA. Browse our HUB-compatible suppressor accessories or pair with a suppressor-ready free-float handguard for a complete build.