Mounts & end caps
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Thread adapters & protectors
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Direct-thread
The suppressor, or its threaded mount, screws directly onto the barrel threads.
- Pros: lightest and shortest option; lowest cost; fewest parts.
- Cons: slower to swap between guns; carbon can lock the can on, especially on rifles; alignment depends on the quality of each barrel's threads and shoulder.
Quick-detach (QD)
A muzzle device (a brake, flash hider or dedicated mount) is installed on each rifle, and the suppressor locks onto it with a latch or taper.
- Pros: fast on and off; consistent alignment and repeatable point of impact on each host; easy to move one can across several rifles; you can shoot without the can and still have a flash hider or brake.
- Cons: added weight and length; a mount on every host adds cost; systems are usually brand-specific.
Pistols: the booster
Recoil-operated pistols need a booster (Nielsen device) mount on the barrel threads so the action cycles with the can's weight. Pistol-caliber carbines generally use a fixed (non-booster) mount. See FN 509 Tactical as a host.
Alignment matters
A misaligned mount can cause baffle strikes. Always check alignment with a bore rod or alignment tool when mounting a can on a new host, and make sure the barrel's thread shoulder is square.
Which one?
| Situation | Pick |
|---|---|
| Rimfire can on one or two .22s | Direct-thread |
| Pistol can on handguns | Booster on direct threads |
| One rifle can, one rifle | Direct-thread or QD, by preference |
| One rifle can, several rifles | QD with a mount on each |
Before buying mounts, confirm each host's thread pitch: thread pitch cheat sheet.
Suppressor covers & wraps
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Frequently asked questions
Is QD better than direct-thread?
Not always. QD systems make moving a can between hosts fast and repeatable, but they add weight, length and cost per host. Direct-thread is simpler and lighter.
Can a direct-thread can get stuck?
Carbon can lock a can to the threads, especially on rifles. Periodic removal and anti-seize where appropriate help.
What is an end cap?
The front cap of many modular suppressors. Different end caps can change the exit bore or adapt the can to different calibers.
Can I use a QD mount on a pistol?
Pistols typically use a booster/piston mount on direct threads rather than a rifle-style QD system.
Keep reading
SuppressorReady earns a commission on some purchases made through links on this page, at no extra cost to you. Availability and pricing change often — always confirm on the retailer's page. Firearms ship only to a licensed dealer (FFL); you are responsible for complying with all federal, state and local laws. Nothing here is legal advice. Suppressor, short-barreled rifle and short-barreled shotgun law is changing quickly in 2026 and differs by state. Several states ban civilian suppressor ownership. Verify current federal and state law, and your coverage status under any court order, before buying. Nothing here is legal advice.