Threaded Barrels Explained: What You Need to Know for Hatsan Jet Mods

The Hatsan Jet 1 and its follow-up model are part of a new wave of modular, pre-charged pneumatic (PCP) air pistols. With their compact frame and serious power, they’ve earned a place in the toolkit of backyard plinkers and pest control enthusiasts. But once you start looking at ways to quiet down your shots or attach other muzzle-end accessories, you’ll notice that one thing matters more than most: the barrel threads.

Threading isn’t just a technical feature buried in the specs. It’s what makes or breaks compatibility with suppressors and adapters. So if you’re looking to upgrade your setup, understanding how threaded barrels work and how they affect accessory use is a smart place to start.

What is barrel threading?

Barrel threading is cutting grooves into the end of an airgun’s barrel. These grooves allow you to screw on accessories like suppressors or muzzle brakes. Threaded barrels are standard on higher-end PCP airguns because they give shooters more flexibility to customize their gear.

Some airguns come with factory-threaded barrels. Others require an adapter that converts a smooth muzzle or non-standard thread into a more widely used size, like 1/2-20 UNF or 1/2-28 UNEF. These are two of the most common thread patterns for airgun suppressors.

If you’ve ever tried to attach a suppressor and realized it won’t screw on properly, threading, or a lack of compatible threading, is probably the issue.

Why adapters matter

Let’s say you have a Hatsan Jet 1. Out of the box, it might not have the exact threading needed to accept the suppressor you’re planning to use. That’s where an adapter comes in. These adapters thread onto the barrel and create a connection point with the proper thread size on the other end.

The right adapter makes your airgun compatible with a wider range of suppressors. Without it, you might be stuck with limited options or forced into modifying the barrel; something most shooters want to avoid.

Comparing Jet 1 and Jet 2-barrel threading

The Hatsan Jet 1 is known for its compact design and powerful performance in a small form factor. It's a go-to option for shooters who want something lightweight but still capable of firing accurately and consistently.

The Jet 2 builds on that, but with a few upgrades, including support for dual cylinders and sometimes differences in factory threading. This means some of the Hatsan Jet 2 accessories won’t always be plug-and-play with Jet 1 models. Threading compatibility is a big part of that.

If you’re moving from Jet 1 to Jet 2 or adding a new accessory like a suppressor, check both the barrel specs and adapter requirements. Just because two models look similar doesn’t mean they’ll work the same way with your gear.

Why does threading impact suppressor use?

Suppressors work best when they are securely mounted to the barrel and connected tight and flush. If the threads are off even slightly, it can lead to poor alignment. That affects how the air escapes from the muzzle, which can throw off accuracy or damage the suppressor.

In airguns, you don’t get the violent recoil or heat that you’d see with firearms. But alignment still matters. A poorly threaded suppressor might wobble or loosen during use. Over time, that can wear down the threads or make the suppressor less effective at reducing sound.

Using a proper adapter that fits your barrel’s threads eliminates that risk. It ensures that the suppressor sits flush with the barrel, without leaks or shifting during shots.

Common thread sizes in the airgun world

Here are a few thread sizes you’ll run into when upgrading Hatsan Jet 2 accessories or working with other PCP pistols:

●     1/2-20 UNF: A popular standard in the airgun community. Works with many suppressors and is often the target thread size for adapters.

●     1/2-28 UNEF: Slightly finer threads, more common in firearm suppressors but used in some airgun setups.

●     M10x1 or M14x1: Metric thread patterns found on some European models.

●     Proprietary threads: Some airguns use threads that don’t match any common size. These usually require a custom adapter.

Before buying any accessories, double-check your airgun’s barrel specs. If the threading isn’t listed, measure it or consult a chart that compares common thread pitches.

Bottom line

Threaded barrels aren’t just for show. For airgun users upgrading the Hatsan Jet 1 or expanding into Hatsan Jet 2 accessories, knowing how threading works can save you time, money, and a lot of frustration. Adapters can solve many problems, but only if you know which ones match your barrel and your suppressor.