The quick reference
| Pitch | Commonly found on | Examples here |
|---|---|---|
| 1/2x28 | 9mm pistols, many .22 LR hosts, 5.56/.223 ARs | SilencerCo Glock 17/19 barrels; SIG P320 threaded barrel; True Precision P365 barrel |
| 5/8x24 | .308/7.62, .300 BLK, other .30-cal rifles | Savage 110 Magpul Scout (.300 BLK and 5.56 versions listed at 5/8x24) |
| Metric (e.g., M13.5x1 LH) | Some European pistols | Check the manufacturer spec |
| Other / proprietary | Some rimfire and specialty guns | Check the listing |
Pitches from product listings as of 2026-09-17. Always verify against your exact barrel.
Threaded replacement barrels
If your pistol isn't threaded, a drop-in threaded barrel is usually the simplest fix. Confirm the barrel matches your exact model and generation.
SilencerCo threaded barrel
Glock 19 · 1/2x28
SilencerCo threaded barrel
Glock 17 · 1/2x28
SIG P320 full-size threaded barrel
1/2x28 RH
True Precision P365 threaded barrel
1/2x28
Rifles listed with 5/8x24
The Savage 110 Magpul Scout comes threaded 5/8x24 in both .300 BLK and 5.56. Note that 5.56 on 5/8x24 is less common than 1/2x28, so check your mount.
Savage 110 Magpul Scout
.300 BLK · 5/8x24
Savage 110 Magpul Scout
5.56 · 5/8x24
Adapters: useful, with limits
A thread adapter can let a can with one mount thread fit a barrel with another. Adapters add length and another joint that can loosen or misalign. Use quality adapters, check alignment, and never use one to put a suppressor on a caliber larger than its rating.
Thread adapters & protectors
category
Mounts & end caps
category
Before you buy
- Confirm your barrel's thread pitch from the manufacturer.
- Confirm your suppressor's mount options for that pitch.
- Decide on direct-thread vs QD (guide).
- Check alignment when you first mount the can.
Frequently asked questions
What does 1/2x28 mean?
A half-inch diameter thread with 28 threads per inch. It's the most common pitch on 9mm pistols, many .22s and 5.56/.223 ARs.
What's 5/8x24 used for?
It's common on .30-caliber rifles like .308 and .300 BLK, and on some other rifles. The Savage 110 Magpul Scout, for example, is listed with 5/8x24.
Can I use a thread adapter?
Adapters exist, but they add length and another interface that can loosen or misalign. Never use one to put a can on a caliber larger than its rating.
How do I find my barrel's thread pitch?
Check the manufacturer's spec or the product listing. It's often marked on the barrel or given in the manual.
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.