4 Stage High Pressure Hand Pump High Pressure Air Gun Rifle Filling Stirrup Pump 40MPA Hand Pump Built-in Double-Deck Oil and Water Separator,Up to 4500 psi (Delivered within 10 days)

This review might be long, but if you want to know whether or not to get this pump, I would read it.Update: Just received my Smaco scuba tank and wow did it work. This pump is just so perfect... I did about 10 pumps and got around 5 breaths out of the tank. I definitely recommend this pump!First of all, this pump is all metal except for 'handlebars', but they are still a very comfortable, durable plastic. This pump does not come with well thought out instructions because, well there really aren't any... You have to be somewhat handy and you have to know which gasket (O-ring) goes with which piece. (The last paragraph will be a setup tutorial) This pump also comes with a one year warranty, which is very nice to have!This pump comes pre-lubed with some type of oil, but I would recommend getting some silicone oil and use that on the main pieces that rub when pumping. The PSI gauge is very helpful because the guage on smaco scuba tanks is in bars, not PSI. I have not yet used it on a mini scuba tank or HPA tank of sort, but I did plug up the holes and there were no leaks at two pumps, which is a great sign.Tutorial: It may look confusing at first, but it's not. The two big screws are going to mount your 'handlebars' on the top of this system. The little white box is your pressure gauge. On the side that the foot pieces connect on, there should be two holes. On the top one, screw the pressure gauge in. On the other hole, screw in the chord that is wrapped in metal. Next, Take one of the smaller o-rings (gaskets) that doesn't look fit on the end of the chord wrapped in wire without a little force. I used my nails and the alan wrench to get it on. Next, screw on the blue piece and make sure to use the wrench to tighten it. DO NOT overtighten or you will strip the threads and have to buy a new one. I don't think the warranty would cover that. Now, give it one pump. If you don't hear any air leaking, you are good. If you do, try putting and o-ring on the hose wrapped in metal where it connects to the hole underneath the pressure gauge.Hope this review helped!

No useful directions to put together. U Tube was helpful. It was pretty straight forward. Lube tube lightly with silicone oil. Tested pressure with plug to check for leakage. About 100 pumps to get to 1000 ( tank and pump gauge matched, very accurate)next 1000 wasn’t to bad, once you reach 3000, it became a bit of a struggle. But the pump did it’s job. My tank shows 6000 capacity, but I doubt I’ll be pumping much beyond 3000. Each 30 rounds from my Sig Vertus uses about 500 psi. Would give this a 5 if I was strong enough to pump the max on the gauge!

Just got mine today. Followed the instructions and put a little oil on the seals and in the main chamber. Pumped my Benjamin Bulldog up to 2900PSI. Will do the rest tomorrow before target practice. Worked great!!!! Definitely happy with it so far! Remember, watch the heat! Take breaks. Once it got to 2000 PSI wasn't too bad to fill the rest of the way. Definitely recommend so fsr on the cost. No oil with it, but lots of replacement filters and o rings and spare parts!!!!!!!

Read it to 4500 PSI, couldn't get it to go over 1,500. Gets the 1500 pretty quickly, but then you pump and pump and pump another 50 or 100 times and the pressure never goes up

I just received the pump in great Condition. Everything appears to be hear, but I'm not sure what to check or do before I start using it. It seems to be ready to go, but some of the parts are hand tight, some are not attached yet, and be sure to order Silicone oil as it doesn't come with it. What oil do I use in the gauge (Glows in the dark BTW). The instructions are there, but a little hard to follow. More to follow.

Easy to use, no problems with it so far after 3 months.

pump arrived late due to flu out break but seller kept in constant contact letting me know the status of my order. will order again.

pretty much not worth it. move on to the next choice bc this one gave in a matter of minutes.