Nachdem ich gerade eine Rezension gelesen habe, bei der moniert wurde dass sich die kleine Folie nach dem Aufschrauben "vertschüsst" hat möchte ich darauf hinweisen, dass der Druck im System nach Beendigung des Ladevorgangs NICHT mit dieser Messingschraube am Manometerblock abgelassen darf, sondern mit der Schraube am Kompressor.Die Messingschraube am Manometerblock mit der innenliegenden Sollbruchstelle dient NUR der Sicherheit bei Überschreiten des höchstzulässigen Druckes!

Excellent compressor that makes light work of filling PCP air rifle, compared to the stirrup pump. Actually quieter than I expected and so easy to operate if you follow the simple instructions. Was considering one of those with the water cooling and oil but so pleased I didn't. No faffing about with buckets of water and oil, just turn on fill and pack away. Brilliant machine and would definitely recommend buying if you own a PCP rifle. 5*

GRANDE PRODOTTO

Just received this unit and have only used it for one fill. But with that caveat, I'm impressed with the obvious build quality and compact footprint. It took 2.5 minutes to fill my Diana Outlaw from 700 bar to 2100 (the pressures I shoot through) and the unit was barely warm afterwards. Easy to use and we'll designed.

I am new to PCP's and of course having no prior experience I did not know which compressor to buy. After much research and looking at the reviews I decided to order this one. For the money I think these could come with a small book with information specific to using it but there are youtube video's to watch that help. After buying this I filled my new gauntlet from zero to 4500 in just a short runtime. I also acquired a scba tank kind of by mistake on ebay but with a current inspection and not expired tank date so I decided to fill it to 4000 psi with this little compressor from zero. It is winter time and I had plenty of time to just fill it a little at a time. I decided that I would only run the compressor for 5 to 8 minutes at a time so not to work it too long. I still had a return window and thought what the heck lets check it out to see if it will work or I will send it back. Well, I also changed the filter out to a larger one to keep water out and around 22 sessions of the 5 to 8 minute later my tank is at 4000 psi. This little puppy reminds me of the little engine that could and while it is slow to fill a large tank, it can, if you treat it right. It just kept chugging along. I still have a return window left but for this little puppy's portability and it's ability, if it continues to work as well as it has I am sure I will be keeping it. I will update this review if I have a problem in the future. I hope the seller is as reputable as many have stated should I have a problem. There are risk to buying these types of items at these prices especially when parts are hard to find but compared to other more expensive compressors you will be hard pressed to find one with this many good reviews. I hope this helps some of you on the fence about ordering this little unit. Good Luck.Update : After running this little gem for close to 3 hours or so total and right after filling the tank mentioned above, I decided that I wanted to check the Piston lube just to see how it was looking. I pulled the plastic plug that covers the piston connecting rod and right away I noticed that the piston had been wearing the end of this plug, in fact it had worn a curved wear mark in the end of this plug curved like the piston. Obviously it had been tightened to far into the cavity, the plug was worn to the point that you could see through the center hole. I thought well, I had better pull the piston to see how much plastic was down inside the cylinder. i pulled the piston and found the piston looked ok but there was very little grease on the piston and what was there was too dry but the cylinder wall looked fine. I noticed that there was indeed black plastic wear that had fallen down beside the high compression piston and there was black stuff up and down the high compression piston but the piston and rings had not been damaged at this point. After watching YouTube videos of a broken compressor and the dried out grease that probably contributed to the drive gear wearing out in that video, I decided to take this one down and evaluate the grease inside the gearing as well as the rod bearing. I found that there was plenty of grease in these areas but I didn't trust the grease that had been used so I removed the old grease and used a high quality grease on the gears and the rod bearing and connecting rod. I chose red atom grease for these areas and I lubed the piston with white Lucas lithium grease both purchased from amazon. Both of these have high ratings and are not warranty breakers as you can see in the questions and answers section that the seller is ask about what kind of grease to use. I put the unit back together after cleaning and greasing the unit and ran a pressure test which proved that the grease I used was definitely superior to what it had before as the unit ran a little faster and quieter than before and pressured up just fine. That test was without the plastic plug installed because I had filed the end of the plug down shorter and applied epoxy inside to seal it as it had not dried yet. The next day I had to depressurize my Gauntlet air rifle .13 cu tank to perform some work on it and after that I installed the plug in this compressor that had dried plus I installed an oring on it to insure that it would seal properly and not thread in too far, any oring the size of the plug should work as this area does not get too hot and this plug only needs to be snug to stay in place. I then aired up my gauntlet tank to 4500 psi and it took approximately 8 minutes from zero to 4500 with my newly greased compressor. It is still the little engine that could but I am reducing the rating to 4 stars overall because I feel that if I had not found this problem I probably would have had serious problems with it real soon. This should not happen to a well thought out piece of equipment with properly made parts and good QC inspections. I hope I can continue to use this little unit and it is my belief that anyone with one of these units should go through it as I did and probably should make this a regular maintenance check. That is what I will be doing and I will update if I find any other problems. Again, this is a nice little workhorse but it probably needs some good old corrective inspection and maintenance for proper long term use. Hope this helps.Update: September 27, 2023. This little compressor is still working great. I continue to use it regularly to fill my scba tank when it gets down in the 3600 psi range back to 4000, which are good ranges for filling my Umarex Gauntlet and my Umarex Origin 22. It takes only 2 to 3 eight to ten minute sessions to top off the tank and then I am good for several fills. I have to say that this little unit has proved to be worth the money, if taken care of. I will probably take it back down this winter and check it out and grease it where needed.Update: 02/13/2024I just checked cleaned and greased my unit and the cylinders where nice and smooth. Good grease that I mentioned that I use above. I reassembled the unit and discovered that I was getting no pressure. What did I do wrong, Took me awhile to figure it out but just in case some of you have an issue I will tell you what I did wrong. If you take the intake check valve apart on the head to clean it pay special attention when you place it back together. The top piece of the check valve has a slight bend near the screw so that the inner piece of the check valve can move slightly up and down to allow air to come into the head. If you place this on upside down the valve will not open and the high pressure piston will starve for air causing it to be operating in a vacuum. Trust me, you will not get any pressure if you do this. I fixed my error and presto, pressure. I still think this is a great little compressor if you take care of it. I expect to use it for another year without any issues.

The GX Pump CS2 Portable PCP Air Compressor has completely transformed my experience as an airgun enthusiast, and I couldn't be more impressed. This compact powerhouse is a game-changer for anyone involved in PCP airgun shooting.The portability of the CS2 is a standout feature, allowing me to fill my airgun tanks on the go without the need for external power sources (as long as you have a 12V battery handy). Its efficiency in delivering consistent and high-pressure air is truly remarkable, ensuring that my airguns are always ready for action.

Por el momento funciona muy bien, solo hay que esperar que con el tiempo y uso se mantenga así.

I waited a couple of months to post. It has been working flawlessly. I have a little 8" fan I point right on it from inches away whenever I use it kicking up the cool airflow. Heat is what kills these things. As long as you use it within spec and avoid "tank filling" like the plauge it will last. This is compact, quiet and I could go on and on about things I like. The gauge is OK at best which I expected. Luckily these compressors are just hardware fittings so you can add whatever you like in the way of air filters, gauges, hoses etc. Just keep in mind this is a small airflow compressor so things like that will slow your fill and cause more heat.It is a great design but I have one constructive critisism. With the move from shrouds to moderators and shorter barrels many guns out there have a tight fit between the end of the air tube and beginning of the moderator. This unit ends with a big square metal block that is not flexable at all. To use this compressor on those guns you have to buy a flexible micro hose. Problem is you only need 6 inches but you are lucky to find a piece of hose with fittings 24". The block also has enough weight and sharp corners to scratch blueing or wood on the gun. A small bit of hose would keep it back from the metal/wood and allow a flex tight fit between the tube and moderators.THIS SELLER IS ONE OF THE BEST ON AMAZON and I buy a lot of stuff. I asked him several technical questions before and after purchasing and he always gave quick and accurate responses. I really like my purchase and have recommended this to friends and people on Airgun sites. This beats the heck out of a high quality hand pump for not much more money.

If you can plug an electrical plug into an outlet, distinguish red from black, "+" from "-", and turn a switch from off to on....you too can setup, operate, and enjoy this machine.Is it slow? Not for what it does. I only run mine for 15 to 20 minutes at a session. Then I let it cool down for an hour or so.Does it work? YES!!!No water pump, no water hoses, and it is QUIET!!! I ran mine in the kitchen with the 110 voltage converter. You can also run it off your car/boat battery. (Suggest you let the car motor run to avoid running the battery down.)Oil??? No! Grease in an applicator, and two threaded plugs that you unscrew to put a bit of heavy grease on moving parts when the time comes. The compressor comes pre-greased!!! So plug and play upon receipt.Max pressure is 300 BAR/4500 psi. May I suggest you go no further than 4000 psi. Experience has shown fills above this pressure just do not return enough extra shots to be worth the effort.My other Chinese compressor, water cooled is long gone. This one is too simple, too effective, too inexpensive, too reliable to save a $100 USD and later struggle with the cheaper brands.It appears to have a larger second stage piston, so it can pump slower, run much cooler, built-in fans supply air flow...you need one of these. Yeah...it's Chinese made, but a much superior design from the water cooled units.I'm 76,and did ten back-flips after filling my pcp, and a .5L pony bottle. The ambulance driver said to just use the pump next time, and rejoice quietly!!!