Folks, I am very impressed by my Hatsan airguns and have no problem recommending them. I’m rally a fan on the pre-charged pneumatic (PCP) guns that have an onboard air tank and can fire 10-20 rounds for hunting plus if you get one if their models with the Quiet Energy (QE) baffle system, they are on the discrete side for pest control.
The Gladius .22 has a 10 round magazine and is a bolt action repeater. It carries three spare magazines at the rear under the stock and they come in handy when you need to rapidly reload. It does happen with pest control actually.
I have two Hatsan precharged pneumatic (PCP) airguns – a full size Gladius .22 long and a compact ATP2. I recently needed to replace the O-rings and started researching what was needed.
My two Hatsan’s get pressurized up to 300 bar, which is 4,351 PSI. That’s quite a bit of pressure that the fill probe’s O-rings need to contain plus they need to be flexible enough to allow for insertion and a good seal. One last consideration is the need to withstand the silicone grease that is used to lubricate them (never use oil-based grease on a PCP or it may diesel under pressure).
The O-rings are wear items meaning they will wear out for a variety of reasons and you can tell because when you go to fill the airgun’s tank, you will hear air escaping plus you probably will not be able to get very much pressure to stay in the line. So when mine went out and I installed the spare set that came with the Gladius, I had to think about getting more spares. Hatsan was out of stock at the time so I decided to dig.
So, I started researching what O-rings would work best and sourced some that work great. They are 70A on the shore hardness scale and made from Buna-N rubber which will withstand the silicone grease.
In addition to fitting Hatsan PCP fill probes, they will also fit the Air Venturi Halestorm, Evanix, FX, Hammerli Pneuma, Kral, Lgun and Raider probes.
While I was at it, I decided to tackle how to keep the probe clean. I’ve had my Hatsans and my Hill Mk4 air pump for a couple of years and have tried to keep bags on the probe to keep it clean. Those semi-rigid airlines flop everywhere and trying to keep dirt off the probe that is sticky with silicone grease is a challenge.
So, after measuring stuff. I came up with two types of caps for people to choose from. The first is a yellow cap with a pull tab.
Sometimes you need targets and don’t have any handy. This happened to me the other day when I needed to sight in two rifles. Since I needed them right away, I whipped up some targets that I then printed and used. It dawned on me that maybe others could benefit from them as well so I created this post with links to PDF files you can use. A PDF file can be opened by most browsers as well as a number of different viewer apps such as Adobe Acrobat Reader.
Please note that the below are just thumbnail graphics. Click on each to open the actual PDF file so you can have sharper image to print and so forth.
One Big Bullseye With Crosshairs
Five Circles With Crosshairs
This is the style shown in the top graphic for this post.
I hope this helps you out!
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