Benjamin 81001 90-Cubic Inch DOT-Certified Charging System Cylinder

Fast delivery and it filled my Benjamin Armada from 2000 to 3000 psi in a few seconds.My unit came with a different type of regulator/hose set up than shown in the image here. It was confusing at first.It took about 50 minutes to fill the tank from 0 to 4500 psi from my small compressor. But once that's done I'll refill it when it gets down to 3000 psi, back to 4500 psi which should just take a few minutes.The tank looks very well-made and was very well packed.This tank should top off my Benjamin Armada in .177 cal from 2000 back to 3000 psi about 10 or more times before I need to recharge the tank. So the tank is the perfect size for me as it's fairly small and very lightweight.So, I recommend this although I'd like to see it a little less expensive.

Best deal out there! 2 gauges for tank pressure and fill/gun pressure. Foster fill valve built into neck, slow fill restrictor and stainless fittings throughout! Tank was only 5 months old when received and holds air perfectly. Not sure of the negative reviews but in reading some of them it's apparent they have no clue how a HPA tank works nor should they use one...Awewsome tank-fills my Marauder .25 about 12 times.

This tank has a few minor issues, so I'd call it a 3 star product. The price on Amazon is super cheap, and is about $100 less than most other retailers, so because its such a bargain I'm giving it a 4 star rating.Here are the issues:1) It does NOT have a regulator, so you need to be careful with the valve when filling your gun. There's no overfill protection.2) The pressure gauge only works when the bottle is connected to a gun and the valve is open, so there is no way to know how much air is left in the tank without connecting it to something and performing a fill.3) This tank leaked where the gauge is screwed into the vale. I have thread sealer and tools, so I was able to fix it, but I don't think I should have had to deal with it.The tank arrives empty, which I expected. Using a Benjamin HAND PUMP, I filled this tank to 3,000 PSI. It took me about an hour and a half (including breaks to let the pump cool) and took around 1,800 pump strokes. I don't mid the work, I just skipped the gym that day. Going to my local dive shop would take 30 mins, and the gym would take an hour, so hand pumping really isn't taking any longer and it's saving me some money.This tank is rated to 4,500 PSI, but I plan to use it to shoot my unregulated gun with a 3,000 PSI fill tethered to the tank, and since the tank doesn't have a regulator either, I'm only filling to 3,000.Shooting my Sumatra 2500 tethered to the tank is great. This gun is known for being an air hog, and having a declining shot string. Shooting tethered to this tank fixes both issues and gives me tons of shots on high power and keeps my POI and FPS consistent shot after shot. The fill probe air line supplied with the tank is short, so I bought a 36'' extension, so I can keep the tank under my shooting table and still have enough air line to comfortably move the gun around.I'll probably upgrade the valve to one with a built in regulator at some point in the future.

I own Benjamin air rifles and they are great quality product. Don’t be fooled by the name they Leak like crazy . Cheap cheap quality, what happened Benjamin company? Why put your good name on this junk. Don’t bother buying. Air Venturi is what you want. Thank god Amazon has a good return policy

This works and is ready to fill right out of the box. The valve/regulator is pcp compatible and ready to fill. I bought a much bigger tank for my big bore rifle and have had to replace the valve/regulator and hose and still haven’t filled it yet. I use with my Benjamin marauder and it’s good for for my entire time of shooting.

Most of the complaints about this tank come from trying to get it filled. The issue is the type of fitting. As it comes, it has a scuba din connector. Any scuba shop can fill this, but many will not unless you have a dive card. As it sits, most paintball stores don't have the din fitting. This can be fixed very easy with a double male nipple that goes in the Quick release and give a male nipple they can fill. On Amazon the Foster paintball both end male quick disconnect SS double male fill nipple with do the job. Problem is, while this means a paint ball shop CAN fill it, some will look at it and refuse to fill.The best way is simply to make your own fill adapter. On Amazon, you can get a scuba choice female 1/4" NPT to male adapter, then get a Anvil 2139 foraged high pressure pipe fitting, 1/4" NPT male to 1/8" NPT female fitting, and finally a captain o ring air fill nipple.With your own adapter made from the three fittings above, you can just screw in the adapter, and any paintball shop will fill it. To use it, just unscrew the DIN adapter, and screw in the hose that came with it, and your done!I would give this five stars if they sent along the fill adapter and raised the price $20The fitting needed are advaible fron many sources. It listed the ones I did because you will get them in a couple day with prime shipping And yes there are other ways to get to it male fill nipple. The combination I gave you can screw into the tank and the guy at the paintball store won't question it.There are other tanks that do have the fill nipple, but read the disctiption carefully because many have a regulator that limits out put pressureHope this helps someoneUPDATE! Attention! I orginaly gave this 4 stars, but now there are some huge problems getting it filled! This tank has a very small flow restrictor. This is intended to be a safety feature. But it creates a huge problem getting the tank refilled.First, dispite having a standard SCUBA DIN connector, I have yet to find a scuba shop that will refill this tank!!! Some claim their insurance prevents it, others simply say they will not unless you have a dive cert card. So far, I have tried at 11 scuba shops and not a single one will fill it.I made the adapter I described in the first part of the review. This allows paint ball fields to fill the tank. But it creates another problem. Most of the pain ball fields around me use a high pressure booster. If they have a storage tank that has 4500 psi in it, the tank will fill to close to 4500 psi ( given time, it would totally fill, but most shops don't want to have your bottle hooked to their tank for an extended time. HOWEVER, if their storage tanks are lower then 4500, and they use a booster pump to get to 4500 psi, their system WILL NOT fill!!!Let's say they have 3500 psi in their storage tank. They will fill to 3500 slowly, but they will fill. The problem is when they use the booster to get up to 4500. Because of the flow restrictor each time the pump pushes air, it quickly fills the adapter to 4500, but the flow into the tank is very slow. End result is the pump quickly goes above 4500 psi and vents. The pressure just can't get into the tank fast enough. The bottom line is that you can't use a booster to fill this tank. As a result, you will seldom get a full 4500 psi, and often only around 3000 psi.BECAUSE OF THE FILL ISSUE, I RECOMMEND AGAINST GETTING THIS TANK!!!