FOUR UNCLES High Pressure Hand Pump 4500 Psi PCP Hand Pump PCP Air Rifle

Seriously if I could give 10 stars I would. First of all the product works exactly as stated. I have a Benjamin Armada PCP rifle that I ordered the same time as this pump. I was a bit hesitant as some have said pumping up a PCP rifle can be a chore, I can state with certainty it is not, at least not with this pump. I was able to charge that rifle from 0psi to 3000psi in about 30 minutes. I followed the instructions about first pumping with no connection at least 20 times to "run it in". I then did the pressure test and it held pressure as intended. I then pumped up the rifle by using 20 full, deliberate and slow motions, let the pump cool for 2 minutes, and repeat. I had no problem getting that rifle to 3000psi from empty. I had one issue with the plug on the gage of the pump, I reached out to customer service and they fixed the issue to my complete satisfaction. I would not hesitate at all to purchase this pump. I am really pleased with the unit, and their customer support is outstanding.

I have used this pump about 7 times with no problems. There is only so much abuse an O-ring can take before failure and putting 4500psi on one—under friction—is asking a lot, but it comes with a rebuild kit. With proper maintenance and realistic expectations, this is a fantastic deal. I can’t imagine how one would make this pump sturdier. It’s solid.When you consider that it costs $4-10 per fill of a Marauder, it pays for itself pretty quick.

Great pump, have only filled my Benjamin Marauder a few times, but it works great and no adapters needed. There is a piece of metal that covers the pumps valve hole so you need to pull the valve back and pull the piece of metal out before trying to connecting it to your PCP. It took me a few minutes of thinking I'd have to order some sort of adaptor until I finally realized I could pull that piece out, rather than unscrewing it. I didn't realize it was supposed to come out in the first place. Lol. What a noob...Update almost 6 months later. I've filled my Marauder about 25 times and haven't had any issues. So far so good. I'm going to be really putting it to the test this summer as I've really been in the mood for some plinking.

This is my first PCP pump. After receiving, I disassembled and thread taped all the threaded connections. On first fill of my PCP, it started blowing air out of the intake valve before reaching 100 bar. I disassembled to find metal shavings in the intake valve. Once I removed those and replaced the rubber ball in the one way valve (with the other that was provided) it pressured up to 200 bar and held air well.The extra o-rings and other wear parts it comes with are very appreciated. Operation is smooth and it feels sturdy. At a fraction of the cost of the name brand PCP hand pumps, and if you aren't afraid to mess with it a little bit, it seems to be a good value so far.

New product. Works fine. It filled my air gun. The price is perfect. You don't need to spend a lot in this type of pump. They are all the same. Is a lot to ask to pack 3000 psi of air with a tiny O ring. The air gun is far less complicated than the pump and don't have to work nearly nothing compared with what the pump has to deliver. Try it with confidence.

This pump is much lower priced than the name brands of accessories but in my instance it works great with my rifle. I completed the checklist that came with the pump checking and tightening all connections well. Performed the initial pump stress test and proceeded to connect to my Diana Stormrider rifle coupling and pumped. After a few stroked the difficulty level became more difficult as detailed in the instructions. But after approximately 10-12 strokes my rifle gauge displayed that the adequate level had been achieved! I then disconnected and fired several pellets downrange and had a blast shooting targets and other objects in my back yard. I am pleased with my purchase of this pump and hope for a long life!

I bought this pump for an Air Venturi Avenger (4350 psi). I wanted to try a hand pump before dropping the money for an air compressor. I chose the FOUR UNCLES pump based on a combination of price and reviews.I should add I’m brand new to the PCP air rifle world.The pump arrived in a timely manner and in good shape. It was understandably heavier than the bicycle pumps I remember from my youth and appeared to be well made. The instructions were easy enough to understand and it came with a wrench and a lot of spare parts.The pump featured a standard(?) size female quick disconnect coupler for attaching to air rifles. It looked like a coupler you’d find on an air compressor, only smaller. It attached easily to the male coupler on the Avenger air cylinder.Although rated at 4,500 psi/310 bar, the gauge on the pump goes to 6,000 psi. But that number’s just a pipe dream unless you’re Mariusz Pudzianowski. I weigh 200 lbs., and when I got to just above 3,800 psi my feet were coming off the ground. I think I tapped out at 3,850psi. Fortunately, there are lower power tunes for the Avenger available to play around with so I don’t have to bust a gut trying to max out the cylinder. See articles at HardAirMagazine.I’ve only used the pump a couple of times and I have nothing to compare it with, but so far I’m satisfied with its performance. It puts air in my Avenger and gives me a workout in the process!

Save yourself some wasted time and effort by first removing all the hose connections, wrapping the threads with teflon tape and tightening them up..., don't even wasting your time doing the 20 pump priming and testing.The universal hand tool included with the hand pump is basically worthless due to the fact that some of the hose connectors have poor machining and are not squared. For a HP hand pump under $75 it rates an overall 3 due to the fact that you'll have to spend 30-40 minutes refurbishing it yourself.After refurbishing, have used this unit 4 times. There is a variance between the pressure reading indicated on the hand pump and the air riflle.