
Availability: In Stock
A Lone Wolf Dist. 21 thread protector in .578"-28 is a simple but essential accessory if you've invested in a threaded barrel for your handgun. When you're not running a suppressor, muzzle brake, or other threaded accessory, exposed threads invite fouling, corrosion, and damage that can compromise fit and function down the road. This protector threads onto .578"-28 barrels to keep them clean and protected between shoots or when you're switching between configurations.
Lone Wolf threaded barrels are popular among shooters building custom slides or upgrading pistols for suppressed shooting, but this cap isn't limited to Lone Wolf gear—it fits any handgun barrel with the same .578"-28 thread specification. Note that it will not fit factory Glock barrels, which use a different thread pattern. If you're running aftermarket, threaded-barrel setups, this is the kind of small-but-smart part that keeps your investment in good shape.
Thread protectors are one of those items that seems minor until you need one—and once you've got one, you realize how often you actually use it. Keep one in your range bag, your suppressor case, or both. It's affordable insurance against the kind of preventable wear that adds up over time.
| Brand | Lone Wolf Dist |
| Thread Pattern | .578"-28 |
| Type | Thread Protector |
| Application | Lone Wolf threaded barrels and compatible aftermarket barrels |
No. This protector is designed for .578"-28 thread patterns and will not fit factory Glock barrels or most factory Glock threaded barrels, which use a different specification.
It fits Lone Wolf threaded barrels and any other handgun barrels with a .578"-28 thread pattern. If you're unsure whether your barrel matches this spec, verify the thread size before ordering.
If you own a threaded barrel, a protector is a worthwhile accessory. It shields the threads from dirt, fouling, and corrosion when you're not running a suppressor or muzzle device, helping preserve the integrity of the barrel and ensuring reliable fit when you install accessories.

SKU: 197548136 • Weight: 0.1oz





Availability: In Stock
A Lone Wolf Dist. 21 thread protector in .578"-28 is a simple but essential accessory if you've invested in a threaded barrel for your handgun. When you're not running a suppressor, muzzle brake, or other threaded accessory, exposed threads invite fouling, corrosion, and damage that can compromise fit and function down the road. This protector threads onto .578"-28 barrels to keep them clean and protected between shoots or when you're switching between configurations.
Lone Wolf threaded barrels are popular among shooters building custom slides or upgrading pistols for suppressed shooting, but this cap isn't limited to Lone Wolf gear—it fits any handgun barrel with the same .578"-28 thread specification. Note that it will not fit factory Glock barrels, which use a different thread pattern. If you're running aftermarket, threaded-barrel setups, this is the kind of small-but-smart part that keeps your investment in good shape.
Thread protectors are one of those items that seems minor until you need one—and once you've got one, you realize how often you actually use it. Keep one in your range bag, your suppressor case, or both. It's affordable insurance against the kind of preventable wear that adds up over time.
| Brand | Lone Wolf Dist |
| Thread Pattern | .578"-28 |
| Type | Thread Protector |
| Application | Lone Wolf threaded barrels and compatible aftermarket barrels |
No. This protector is designed for .578"-28 thread patterns and will not fit factory Glock barrels or most factory Glock threaded barrels, which use a different specification.
It fits Lone Wolf threaded barrels and any other handgun barrels with a .578"-28 thread pattern. If you're unsure whether your barrel matches this spec, verify the thread size before ordering.
If you own a threaded barrel, a protector is a worthwhile accessory. It shields the threads from dirt, fouling, and corrosion when you're not running a suppressor or muzzle device, helping preserve the integrity of the barrel and ensuring reliable fit when you install accessories.
SKU: 197548136 • Weight: 0.1oz
