Feinwerkbau 80 target air pistol

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fronteria
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Feinwerkbau 80 target air pistol

Post by fronteria » Sat Jun 01, 2019 11:29 am

My mate has a recoilless side lever Feinwerkbau 80 target air pistol in it’s original case complete with all of the tools, sights and weights that were supplied with it when it was original purchased by him when it was new.
The pistol in good condition.
What is it worth as he is looking to sell it.
If anyone is interested I can probably get photographs of it.
It was last serviced by Debens several years ago and has had little or no use since.
When I see him next I will collect it and add some photographs of it so you can see for yourself.

fronteria
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Re: Feinwerkbau 80 target air pistol

Post by fronteria » Fri Jul 12, 2019 10:19 am

Can't sell this FWB 80. I took it to the club to give it a real test, after quite a few shots the anti-bear trap stopped the cocking arm being returned to shooting position, I suspect that the sear is sticking and failing to hold the piston in the cocked position causing the anti-bear trap system to operate, after much gigging around with the cocking lever it was possible to cock the pistol and get the cocking back into its firing position and fire the air pistol, this happened several time during the evening, I suspect the cause is the sear is sticking because it has not been used for around twenty years and the grease has congealed.
So it can’t be sold with this defect, it up to my mate to decide what his next move is.

fronteria
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Re: Feinwerkbau 80 target air pistol

Post by fronteria » Fri Jul 12, 2019 11:21 am

The parts have arrived from Germany these are a complete set of seals, Buffers, Piston ring, new springs and a tube of FWB special grease.
On striping the pistol, the slides on the recoilless system were stuck so the system couldn't have worked, this had to be freed up before the pistol could be striped as it has to be moved to get access to some of the E clips to be removed.
The spring was removed after further striping, had a fair bit of preload so I had to use a sash clamp to remove the end cap.
The trigger components are quite complicated so it was photographed at each stage.
On cleaning and inspecting the parts the seals were worn but complete, the buffer was still serviceable but was going to be replace anyway.
The small damper had failed and was like the consistency of cheese as expected, this was replaced with the latest one made from the more durable black material.
The springs were an inch shorter than the new ones which I was going to replace anyway.
The rebuild is underway I have got to make two dummy pins before I can rebuild the trigger set which is the next job.
If you are interested there are a couple of new photographs of the original seals, buffer and damper, and the new seals buffer and damper fitted to the slide and piston.
https://www.flickr.com/photos/fronteria ... 8975307536

fronteria
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Re: Feinwerkbau 80 target air pistol

Post by fronteria » Sat Aug 03, 2019 4:31 pm

Rebuild of the Feinwerkbau 80 target air pistol complete, test results from my chronograph below:
Foot Per Second 429.6 Foot Lbs. Energy 3.57
This is the average over 5 shots with pellet weight 8.7 grs.
Bisley Pest Control Pellets used for test. (these were the heaviest pellets I had)
Variation over 5 shots 6 feet per second.
Having now completed the Feinwerkbau 80 rebuild I found that although there was quite a lot of information on how to repair and rebuild the Feinwerkbau 65 on YouTube in the form of videos there was nothing on the Feinwerkbau 80 which is quite similar but has a very different firing and trigger mechanism to the Feinwerkbau 65.
The two pistols share components like the seals, buffers and piston rings, but the Feinwerkbau 80 has two main springs one inside the other unlike the Feinwerkbau 65 which has a single spring.
I took me three hours to re-assemble the Feinwerkbau 80, of which most of the time was spent rebuilding the firing and recoil mechanism which was more of a very fiddly time-consuming job rather than a complicated one.
I took the rebuilt Feinwerkbau 80 to the club and one of the better pistol shots tried it shooting it at 10 metres (not me might I add).
If you are interested, I have scanned the target which he shot, he had never shot a Feinwerkbau 80 before.
This is the scan of the target he shot free hand at 10 metres one flyer but overall a pretty good group with a Feinwerkbau 80 he had never shot before: https://www.flickr.com/photos/fronteria ... 8975307536

fronteria
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Re: Feinwerkbau 80 target air pistol

Post by fronteria » Tue Sep 03, 2019 3:08 pm

Sold to Protek Supplies

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