A suppressor hub, also known as a universal mount, has become the industry standard for attaching suppressors to rifles and pistol-caliber carbines. The standard hub thread is 1.375×24 or 1 3/8×24. This standardized threading allows you to use a wide variety of mounting systems and muzzle devices from different manufacturers on a single suppressor. Essentially, a HUB-compatible suppressor is a modular platform that lets you choose the mounting solution that best fits your needs, whether it's for speed, weight savings, or maximum accuracy.

How it Works

Before the HUB system was popularized, many suppressor manufacturers used unique, brand-specific threading, which forced a user to buy both the suppressor and its corresponding mounting hardware from the same company. If a user owned several firearms with different muzzle devices (like a flash hider or a muzzle brake), they would have to buy the specific mount for each firearm from that one brand.

The HUB system changed this by creating a universal interface on the suppressor itself. This allows a shooter to attach different mounting solutions from various manufacturers to the same suppressor. This is a significant advantage because it lets users customize their setup to their specific needs.

The Different Kinds of Suppressor Mounting Systems

The world of suppressor mounts can be broken down into a few primary categories. While some suppressors come with a direct-thread mount, a HUB suppressor mount allows you to swap to a quick-detach system. Let's look at the main types you'll encounter.

1. Direct-Thread Mounts

This is the simplest mounting system. The suppressor screws directly onto the barrel's threads.

• Pros:

  • Simplicity: No extra parts, just thread it on.
  • Cost-Effective: Often the least expensive option.
  • Lightweight: Adds minimal weight and length to the firearm.

  • Accuracy: Some precision shooters prefer direct-thread mounts, as they reduce "tolerance stacking" by having fewer moving parts.

• Cons:

  • Slow: It takes time to screw on and off, making it less ideal for quick swaps.
  • Prone to Loosening: Without a locking mechanism, they can sometimes come loose during extended firing.

2. Quick-Detach (QD) Mounts

QD mounts are designed for rapid attachment and removal. They generally consist of a HUB muzzle device (like a brake or flash hider) that stays on the barrel, and an adapter that screws into the suppressor's hub. The two components then lock together.

There are two main subcategories of QD systems:

• Passive Locking: These systems use a tapered surface and threads to create a secure, friction-based lock-up. As you tighten the suppressor, the tapered surfaces compress, creating a tight seal and preventing the mount from loosening.

• Active Locking: These mounts use a mechanical locking collar or ratcheting system to secure the suppressor to the muzzle device. They have a defined locked and unlocked position, giving you a clear visual and tactile confirmation that the suppressor is secure.

Popular examples of QD mount suppressors include:

• Dead Air KeyMo: A well-known system that uses a ratcheting collar for a secure lock-up. It's often considered a robust and reliable option, though it can add a bit of length and weight.

• SilencerCo ASR: This system uses a locking collar to secure the suppressor, and is known for its consistency and ease of use.

• Q Plan B: This system uses a tapered surface for a tight lock-up without a separate locking mechanism. Paired with a muzzle device like the Q Cherry Bomb, it's a very lightweight and simple QD option.

• Pros:

  • Speed & Convenience: Quick and easy to attach or detach the suppressor.
  • Versatility: Allows you to easily swap one suppressor between multiple firearms.
  • Secure Fit: A locking mechanism or taper prevents the suppressor from loosening during firing.

  • Muzzle Device Benefits: The muzzle device left on the barrel can act as a brake or flash hider when you're not shooting suppressed.

• Cons:

  • Added Weight & Length: QD systems typically add more weight and length compared to a direct-thread mount.
  • Cost: The initial investment for the hub adapter and multiple muzzle devices can add up.

3. Tri-Lug Mounts

Tri-lug mounts are a specialized form of quick-detach, most commonly used for pistol-caliber carbines and submachine guns. They allow for an extremely fast and simple attachment and detachment with a simple push-and-twist motion.

• Pros:

  • Incredibly Fast: The fastest mounting system for suppressors.
  • Durability: Minimal wear and tear on the components.

     

• Cons:

  • Specialized: Not suitable for high-power rifles.
  • Bulk: Can be bulkier than other mounting options.

Choosing the Right Suppressor Hub

So, which system is right for you? It really comes down to your priorities.

• If you're building a dedicated, lightweight rifle and want the shortest possible setup, a direct-thread mount is an excellent choice.
• If you're a high-volume shooter or someone who likes to swap their suppressor between several rifles, a QD system like the Dead Air KeyMo or SilencerCo ASR will give you the versatility and security you need.
• For the minimalist who wants the benefits of a quick detach without the bulk of a separate locking collar, a tapered QD system like the Q Plan B is a fantastic option.

The rise of the universal 1.375×24 HUB has been a game-changer for the suppressor industry, giving you more freedom and modularity than ever before. With a HUB-compatible suppressor, you're not locked into a single company's ecosystem. You can mix and match to build the perfect suppressed firearm for any situation.

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