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Bsa Scorpion Seal And Spring

Discussion in 'Air Pistols' started by Halinfax, Apr 10, 2020.

  1. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Gentlemen... I have been fortunate enough to have been asked to overhaul a fellow members BSA Scorpion air pistol as part of a tinkering project.

    Upon receipt of the gun today at 4pm, by 5.15pm I had it all fully stripped and assessed.

    The seal/buffer behind the nylon piston head is in ruins as per the photos and the spring looks like it has sprung round an S bend..

    20200410_184004.jpg

    So, my first question, can I make a buffer for the piston out of delrin or do I need some other material. Second question, best place to get a new spring and breach seal for the pistol (presumeably Bagnalls & Kirkwood etc)

    Thirdly, do any forum members have any of the above mentioned parts please.

    Many thanks in anticipation as this project will be documented in the near future.

    Thanks Gentlemen...
     
    Redcap 114 likes this.
  2. Redcap 114

    Redcap 114 Forum Nice Guy 2020.

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    Nice one Hal,

    I look forward to seeing your progress with this project. I wish you the best of luck. It was good talking to you on Skype tonight.

    Stay safe you two.
    All the best.
    Les.
     
    Halinfax likes this.
  3. Molgraze

    Molgraze Donator

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    Why try to make one?
    These parts as far as I’m aware, are available on either Knibbs or Chambers sites.
    I have several of these pistols, and all of the spares I have obtained, are from these two suppliers.
    Admittedly this was two or three years ago.
    Good luck with your refurbs:up::thumb:
     
  4. Molgraze

    Molgraze Donator

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    Had a couple of mine out in the garden today, fabulous old pistols, kick like a mule, same as the HW45, very similar power output and very satisfying when you hit what you’re aiming at :D:D
     
  5. ggggr

    ggggr Crap old gun tinkerer and wine maker

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    Nibbs or Chambers should have the bits. You can get some poly tube off the bay for about £2 for 3ft --I have made them but cutting a bit with a hack saw and them sanding to fit. If you have a lathe a lot easier.
    You can use a Tap washer as a buffer but will probably have to open the hole a little. I was given some thick leather washers and have fitted them to a couple of guns as they are less prone to degrade and stick than the normal washer.
     
    Last edited: Apr 11, 2020
  6. gedfinn

    gedfinn Posting Addict

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    I have a few of these & Spares but not the ones you require,
    Great guns & A real handful. ( I use tap washers for the buffer ) This a Gas Ram I was going to fit, As usual another on the wish list Ha ha

    Cheers Ged. STA70335.JPG STA70330.JPG STA70291.JPG
     
  7. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Gents.. would thick rubber sheet or rubber washers suffice??
     
  8. tommy gun

    tommy gun Posting Addict

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    Tap washer [ bath ] I put the same one on meteors
     
  9. wezil

    wezil Keyboard Hero

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    Hi,just rebuilt one myself and i cant reccomend TR Robbs piston and seal kit highly enough.My scorpion now cocks easily with one hand and no cocking extension needed seems smoother with less vibration and an absense of spring twang and less recoil. Not badly priced either i thought at £20 ish with a stainless piston head a selection of different thickness buffer washers and o rings to match your cylinder diameter.
     
  10. ggggr

    ggggr Crap old gun tinkerer and wine maker

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    I thought the kit was decent value for money when I ordered it, with the different buffers and O rings. However mine came with a hexagon headed nut to hold the head--AND the mainspring would not sit over it, but on ito_O Despite trying to phone and someone who calls into the shop telling him of the problem, and him promising to send a new round nut with locking hole in it, it never came. I found a O ring I had fitted better than the ones that came with the kit and also that the weight of the piston head was half of the piston! I stuck with it a while but never liked it. Eventually I went Retro and fitted a leather washer.
    The idea of the kit is sound but poorly executed. :(
     
  11. wezil

    wezil Keyboard Hero

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    Sorry to hear that personally i had no problems although it was tight to fit at first after the first shot every thing settled in just rememberd at the end of the spring was a thick washer that would normally fit inside the piston presumably as a spring buffer i didnt refit it as i got the round type nut (my scorpion has probably only fired a few hundred rounds and was essentialy new, wonder if the lack of this washer might have given problems it covered the original piston head rod as it came through the piston thus giving the spring a soft seat. Again the o rings seemed a good fit not to tight as to drag but not sticking.
     

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