Looking for help with charging an FWB 800

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Chuck4x4

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Jul 22, 2024
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I'm as new as the day is long to air guns. My brother in laws older brother passed away a few months ago, I was asked to help with the estate affairs. Attached is one of the air guns I have. The brass fitting shown here attaches to the rifles air cylinder. I need whatever it takes to attach it to an air compressor. I'd like to test fire this rifle before selling it.

Cheers,
Chuck

FWB 800.jpg
 
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rc4fun said:
It seems like the orginal owner would have had all the proper fittings to fill the gun. Someone should take inventory with pictures of everything in the storage room.
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The family was not able to see everything after his death. Sadly this gentlemen passed away in his home, unfortunately he was found a few weeks later. My brother in law suspects a lot of his personal belongings were disposed of by the company that did the cleaning. No compressor found, it would appear he used air tanks to fill his guns. These tanks are breathing air Firemen use. They are all old so it's my guess being he was a retired cop, he probably obtained them from one of the local fire stations. All the tanks are fitted with an air gauge and quick disconnect fittings. There are several other guns that are missing specialized fittings.
 
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CA showed the correct part (unless the rifle is modified & doesn't really look like t from the picture and who the heck would do such a thing?).
So the adapter will screw onto the cylinder then you just use the standard foster quick connect fitting.
Those "old" scba (do check for hydro test date) will be fairly impossible to get filled commercially but lot's of people with home compressors use them IF in good condition -so do not throw them out! - . Your friend who grabbed a few airguns from you Should have air & likely you made him a deal so find/purchase the fitting and kindly ask for a fill. This appears the correct fitting but do call and be certain: https://www.pyramydair.com/product/...din-adapter-with-male-quick-disconnect?a=5358
Seems a bit odd removing the tube every time but you should get 300ish shots per fill.
Your rifle should also have a "dry fire" mech so you may try the trigger as much as you like w/out air. The manual covers the dry fire mech: https://www.feinwerkbau.de/en/service/downloads/technical-information/manuals
BUT you do want to fire it. Believe a 700 took Gold at the last Olympics.

Have fun!

John
 
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John spysir Blount said:
CA showed the correct part (unless the rifle is modified & doesn't really look like t from the picture and who the heck would do such a thing?).
So the adapter will screw onto the cylinder then you just use the standard foster quick connect fitting.
Those "old" scba (do check for hydro test date) will be fairly impossible to get filled commercially but lot's of people with home compressors use them IF in good condition -so do not throw them out! - . Your friend who grabbed a few airguns from you Should have air & likely you made him a deal so find/purchase the fitting and kindly ask for a fill. This appears the correct fitting but do call and be certain: https://www.pyramydair.com/product/...din-adapter-with-male-quick-disconnect?a=5358
Seems a bit odd removing the tube every time but you should get 300ish shots per fill.
Your rifle should also have a "dry fire" mech so you may try the trigger as much as you like w/out air. The manual covers the dry fire mech: https://www.feinwerkbau.de/en/service/downloads/technical-information/manuals
BUT you do want to fire it. Believe a 700 took Gold at the last Olympics.

Have fun!

John
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Thank you for the links John. I have been to the Feinwerk's page, it's the best page I've seen so far. A ton of good informational DL's.

This rifle has not been modified. I am not sure if something is missing on the lower hand rest pad. It was also missing the entire front and rear sights, the charge fitting and owners manual. I obtained all from the dealer in Texas, very expensive parts.

I believe these tanks are outdated for hydro's. I'm not sure what to do with them. Yes, my friend has a cheaper version of a compressor but it does work, and yes he got a sweat deal as I knew he would have to reseal most if not all of them.
 
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Chuck4x4 said:
Thank you for the links John. I have been to the Feinwerk's page, it's the best page I've seen so far. A ton of good informational DL's.

This rifle has not been modified, it is missing the lower bench rest pad. I'm not sure if thats the correct name for it. It was also missing the entire front and rear sights, the charge fitting and owners manual. I obtained all from the dealer in Texas, very expensive parts.

I believe these tanks are outdated for hydro's. I'm not sure what to do with them. Yes, my friend has a cheaper version of a compressor but it does work, and yes he got a sweat deal as I knew he would have to reseal most if not all of them.
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Unfortunately that adapter is not in stock but I'm on their waiting list
 
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BrazosbyNemo said:
I can help but too much to type. PM me if you are interested and I will PM you my phone number. That is a very nice rifle and you need to get it sorted out. I can FaceTime you and show you how it all works as I have everything to make it work.
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That's what everyone tells me, it sure looks well made. I understand it's extremely accurate as well. We can chat soon, I'm up to my ass in projects right now. I should leave retirement, go back to work so I can get time to myself. lol
 
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Star7 said:
At risk of starting a $hit storm, the current knowledge on SCBA tanks is they are much more robust than the DOT knew. As was said, do not throw them out. Someone will likely use them for many more years. If nothing else, degas and sell the valves on ebay.

The p800 is a marvelous rifle.
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Are you saying the Scott air packs that I have are better than a scuba tank?
 
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Chuck4x4 said:
That's what everyone tells me, it sure looks well made. I understand it's extremely accurate as well. We can chat soon, I'm up to my ass in projects right now. I should leave retirement, go back to work so I can get time to myself. lol
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No problem. I shoot 10M rifles and pistols with the removable air cylinders. I am set up to fill them straight from the tank using the adapter that came with the rifle or adding the adapter, shown in one of the posts above, to the adapter supplied with the rifle to fill with a foster type fitting. I think it would just be easier to FaceTime you and show you how to fill both ways. I think you have the fill adapter that came with the rifle in one of your pictures. If not let me know as I have a new one I don’t need. When my daughter started on her HS rifle team they issued her a FWB 800. I bought a FWB adapter so we could fill her rifle when she brought it home to shoot over Christmas break. I don’t think we ever used it as she started shooting a Walther right after that and I don’t have a FWB to use it on. That’s a very good rifle. If you watched any of the 10M air in the Olympics over the past few days that same rifle was up and down the line. FWB and Walther 10M rifles are by far the most used rifle in the 10M world.
 
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My experience with scuba as in divers' tanks, is very dated. If nothing has changed, even a glass wound tank is more secure over time. C fiber is lighter and newer. But it has been two decades since I last used a scuba tank.

The other thing; if something is made foolproof. God will make a better fool. I trust tanks that were in cert and inspection at the time that I bought them, or brand new from a reputable source, I use a very clean air source and do not need to fill them right to the limit.

it's my funeral and if something goes wrong, my next of kin will be jubilant, my funeral and no one else's.
 
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Technically aluminum and steel scuba tanks do not have an expiration date. BUT, many dive shops have adopted a 20 or 25 year life cycle on them. Why? To sell more scuba tanks. With yearly inspections and five year hydros you are good to go. Some years ago there was a manufacturer named Luxfer that made a proprietary aluminum that had lead added to the alloy to make forming easier. Unfortunately they started cracking in the area of the threads. Pretty much no dive shop will fill one any longer. The SCBA’s air gunners use typically have a 15 year life in the U.S.A. and 30 in Europe. In reading here on AGN, a lot of users disregard hydros and end of life dates. What you do is personal. BUT, you are responsible for any injuries that might occur should a tank fail, very very unlikely but something to think about.
 
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For filling an air cylinder off a 10M rifle I prefer a scuba tank using the fill adapter supplied with the rifle. It’s just easier to screw the air cylinder directly to the tank. These 10M rifles get lots of shots per fill so even when the tank goes below 3000psi you still have plenty of fills.
on another note, when I started shooting a PCP carbon fiber tanks weren’t really around yet. I went to a scuba shop and bought a new steel scuba tank. The owner of the shop would fill it up to around 3300psi. His comment to me was he wasn’t too concerned about Airgun shooters as we shot the tank down to close to 2000psi and came back for a refill. Scuba divers run the tank down much lower so a lot of contraction and expansion going on. Scuba divers were also harder on tanks just by nature of scuba diving. Made sense to me. My biggest gripe about a full size steel scuba tank is that they are heavy. My advice to the OP is to keep and use the tanks. If they are out of date have them hydro tested and filled at a scuba shop or buy a compressor and just fill them at home And not worry about expiration dates. He won’t need to fill them often. Since they are 3000psi tanks he won’t need some bad ass compressor.
 
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BrazosbyNemo said:
No problem. I shoot 10M rifles and pistols with the removable air cylinders. I am set up to fill them straight from the tank using the adapter that came with the rifle or adding the adapter, shown in one of the posts above, to the adapter supplied with the rifle to fill with a foster type fitting. I think it would just be easier to FaceTime you and show you how to fill both ways. I think you have the fill adapter that came with the rifle in one of your pictures. If not let me know as I have a new one I don’t need. When my daughter started on her HS rifle team they issued her a FWB 800. I bought a FWB adapter so we could fill her rifle when she brought it home to shoot over Christmas break. I don’t think we ever used it as she started shooting a Walther right after that and I don’t have a FWB to use it on. That’s a very good rifle. If you watched any of the 10M air in the Olympics over the past few days that same rifle was up and down the line. FWB and Walther 10M rifles are by far the most used rifle in the 10M world.
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Yes I have the brass charging fitting that comes with the rifle. So if I fill the cylinder directly from a scuba tank, I would use the gauge on the cylinder to monitor the pressure? The Din 300 is the valve on the scuba tank?
 
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Chuck4x4 said:
Yes I have the brass charging fitting that comes with the rifle. So if I fill the cylinder directly from a scuba tank, I would use the gauge on the cylinder to monitor the pressure? The Din 300 is the valve on the scuba tank?
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Yes. Screw the adapter into the tank. Screw the air cylinder on to the adapter. Turn the big black knob to fill the cylinder. Use the air gauge on the air cylinder to monitor pressure. When you get to max pressure close off the air with the big black knob. Unscrew the air cylinder. Fill the air cylinder slowly so you don’t build up too much heat (which can turn into condensation in your air cylinder). Since it is a scuba tank that has 3000psi or less in it you won’t over fill the air cylinder. That said play it cool your first fill or two until you figure out how much air is left in the tank. I can’t remember the max air pressure for a FWB air cylinder. Walther is 300 bar (over 4000psi) so no way a 3000 psi scuba tank would over fill a Walther cylinder. Assume for now your FWB has a max fill of 200 bar (around 3000psi.) to be safe. verify the max fill pressure in the manual or look at the gauge on the air cylinder and see what it shows for max Psi. Hope that made sense and helped.

you can leave the fill adapter on the scuba tank. Just cover it with a plastic bag or something so dust doesn’t get into it Between fills.
 
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