Glock Threaded Barrels: What Fits the Glock 19, 19X and 44
Quick answer
Threaded 9mm Glock barrels for the G19 family use 1/2x28 right-hand threads. The .22 LR Glock 44 is different: its factory threaded barrel has M9x0.75 threads, and Glock sells an adapter that changes them to 1/2x28. Which barrel you need depends on the model and the generation, so match both before you buy.
Fit table
| Barrel (as listed by sellers) | Threads | Listed fit |
|---|---|---|
| Glock G19 threaded barrel, Gen3-4 | 1/2x28 RH | G19 Gen3 and Gen4 |
| Glock threaded barrel 47698 | 1/2x28 RH | G19 Gen5, G19X, G45 (9mm) |
| True Precision threaded barrel (aftermarket) | 1/2x28 | G19 Gen3-5, G19X Gen5, G45 Gen5 |
| Glock 44 threaded barrel kit, 4.5 in | M9x0.75 RH, adapter to 1/2x28 included | G44 only |
What a thread protector is
A thread protector is a small screw-on cap that comes with a threaded barrel. Sellers list one as included with each barrel above. The True Precision barrel also comes with a high-temperature O-ring. One seller warns that the longer muzzle can change how the gun fits a holster when nothing is installed on the threads.
Glock 19, 19X and G45 barrels
Glock's own barrel for the Gen5 G19, the G19X and the G45 is a steel, black-finish barrel about 4.47 in long, with 1/2x28 threads and a thread protector. For the G19 Gen3 and Gen4, sellers list a separate Glock barrel, also 1/2x28, with a thread protector, in a black DLC finish. They are listed for different generations, so use the one listed for yours.
The True Precision barrel is listed for the G19, G19X and G45. It is 416R stainless, 4.50 in long, with a 1:10 right-hand twist.
Glock 44 (.22 LR)
The Glock 44 threaded barrel is a 4.5 in .22 LR barrel with M9x0.75 right-hand threads. The kit includes a 1/2x28 adapter and a thread protector. It is listed for the G44 only. The adapter alone is a Glock part, number 50505.
Gen6 fit
We could not confirm that any of these barrels fit a Gen6 pistol. The True Precision page says a Gen6 pistol needs a Gen6-specific barrel, and a Gen6 review says Gen6 barrels do not interchange with Gen5 frames. If you own a Gen6, ask before you order.
Our catalog
We list these two: Glock 23 OEM Threaded Barrel Black, and Glock 19XV MOS Threaded Barrel 9mm Black. Read each product page for the exact model it fits.
Sellers advise that Glock parts be installed by a Glock certified armorer.
FAQ
What thread does a 9mm Glock 19 barrel use? 1/2x28 right-hand, per the listings above.
Does the Glock 44 use 1/2x28? Not from the factory. It ships with M9x0.75 and a 1/2x28 adapter is available.
Will a Gen3-4 barrel fit my Gen5? Sellers list separate barrels for Gen3-4 and Gen5, so use the one listed for your generation.
General information, not legal advice. Current as of September 2026. Laws change; check the official source before you act.
