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When choosing a suppressor, the mounting system determines what barrels and muzzle devices it will work with. The three most common options are direct thread, proprietary quick-detach (QD), and HUB-compatible systems.

Direct Thread (Fixed Mount)
A direct thread suppressor screws directly onto the barrel using a specific thread pitch (such as 1/2×28 or 5/8×24). These are simple and secure, but they only fit barrels with the matching thread pitch and do not use a QD system.

Some direct-thread suppressors are fixed and cannot accept alternative mounts.
Example: The Gemtech Tracker is a 5/8×24 direct-thread suppressor. It is not QD and not HUB compatible, so it mounts only to barrels with the correct thread pitch.

Proprietary Quick-Detach (QD)
Proprietary QD suppressors attach to manufacturer-specific muzzle devices. These systems allow fast installation and removal but are limited to that company’s compatible mounts. In many cases, the mounting system is integral and cannot be swapped out.
Example: The Surefire SOCOM RC2 is a factory quick-detach suppressor that mounts only to Surefire SOCOM-compatible muzzle devices. Its QD mount is built in and cannot be removed or replaced.

HUB-Compatible Suppressors
HUB-compatible suppressors use an industry-standard rear thread pattern (commonly 1.375×24), allowing the use of different mounts from various manufacturers. Many ships have a direct-thread mount installed, but can be converted to other QD systems by swapping the rear mount.

Example: The Otter Creek Labs Polonium is HUB compatible. It includes a direct-thread mount but can be adapted with a HUB system—such as one from HUXWRX—to work with compatible muzzle devices.

In short, direct thread is fixed, and thread-specific, proprietary QD systems lock you into that manufacturer’s muzzle devices, and HUB-compatible suppressors provide the most flexibility by allowing interchangeable mounting systems.

A suppressor will only mount to your firearm if the barrel is threaded — or if a compatible threaded muzzle device is installed — and the thread pitch matches the suppressor or its mounting system.

Threaded Barrel Required
Most suppressors attach using barrel threads at the muzzle. If your firearm does not have a threaded barrel, you’ll need to have it professionally threaded or install a factory or aftermarket threaded barrel (common on many modern pistols and rifles).

Thread Pitch Must Match

Thread pitch refers to the diameter and thread spacing cut into the barrel. The suppressor (or its direct-thread adapter or muzzle device) must match that exact pitch.

Common examples:

• 1/2×28 – common for .22 LR, 9mm, and 5.56/.223
• 5/8×24 – common for .30 caliber rifles such as .308 and .300 BLK
• Metric options (e.g., M13.5×1 LH) are common on some European pistols

If the thread pitch does not match, the suppressor will not mount properly. Forcing mismatched threads can damage the barrel and may cause dangerous alignment issues.

You can reference common barrel thread patterns here:

https://www-wp.silencercentral.com/wp/wp-content/uploads/2020/06/Common-Barrel-Thread-Patterns.pdf

Even if you’re using a quick-detach (QD) suppressor or a HUB-compatible system, your barrel still needs the correct thread pitch to accept the required muzzle device. The suppressor locks onto the muzzle device, but the muzzle device itself threads onto the barrel.

Bottom line: Your firearm must have the correct threaded barrel (or compatible muzzle device), and the thread pitch must match the suppressor or its mounting adapter. Always verify your barrel’s thread specifications before purchasing.

Trading Place Pawn & Indoor Gun Range will only sell firearms to individuals who are permanent residents or citizens with a Georgia ID and residence. We do not sell to out-of-state, military orders, or visa’d individuals. Your identification must be up to date, showing your full legal name, unexpired, and must include your current address. Handguns/NFA for 21+ ONLY, Rifles/Shotguns, according to Federal law, require a two-week automatic delay for all buyers under 21.