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Airsporter .177 Mk2 - is this bit original?

Discussion in 'Anything Airgun Related' started by AlanOthen, Jun 9, 2014.

  1. AlanOthen

    AlanOthen Member

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    When I first acquired my Airsporter in about 1972 it had a non-original looking screw protruding in front of the trigger guard (see attached photo). Is this indeed an original BSA part, or perhaps a replacement by the previous owner?
    Alan
     
  2. Patrick

    Patrick Donator

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    No it's not original there should be a grub screw there which you use to adjust the trigger using an allen key.
     
  3. AlanOthen

    AlanOthen Member

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    Many thanks, that question has been bugging me for the past 40 years!
    I'm wondering whether the original part might be available somewhere (it would be much appreciated if anyone knows of a source)?
    Alan
     
  4. bhodge

    bhodge Keyboard Hero

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    Assuming its the right thread...why not make your own, cut the head off said bolt and then cut a slot in the required piece so it can be 'adjusted' with a small screwdriver.
     
  5. secretagentmole

    secretagentmole Low down, dirty and quiet...

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  6. AlanOthen

    AlanOthen Member

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    Hey Mole,
    You suggested getting an original BSA part! Anyway, I've found the original part at John Knibbs International for £3.50, so there is one on its way. I
    think Bhodge's idea of cutting it down would have worked perfectly well as it is the correct thread and even seems to be milled at the end to fit the trigger adjuster mechanism. I'm wondering whether it was from another gun and just happened to fit when the original grub screw fell out whilst rabbiting 45 years ago?
    I think it will be best to keep it original with the exception of the minor cosmetic issues we discussed Mole: leave the patina as it is now (I like it), re-fit the original aperture sight, fit a proper BSA trigger adjuster screw, rub down the enamel where it has come off and repaint with as near to the original BSA paint as I can find ... and I think that is it.
    Many thanks for testing the muzzle velocity Mole, when I worked out the numbers: 786 ft/sec with a 7.9 grain pellet gives (if my calculation is correct) a kinetic energy of 10.84 ft.lbf, which is impressive for a 50 year old springer.
    Alan
     
  7. secretagentmole

    secretagentmole Low down, dirty and quiet...

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    They do not make BSA spring powereds like your old Airsporter anymore! Fond something very similar when someone else asked me to look at an original Airsporter, similar age to yours, knocking out over 10.5 ft lb in .22! They seem to last well!

    When we meet next I will bring the Goldstar over so you can compare!
     
  8. Patrick

    Patrick Donator

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    An aerosol can of Smooth Hammerite is probably the best option for the trigger block,it's quite hard wearing
     
  9. AlanOthen

    AlanOthen Member

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    I look forward to seeing the Goldstar Mole.
    The Airsporter is finished now: smooth enamel for the metal parts, a small repair to the stock, I took Bhodge's advice and cut down the trigger limiter screw so it looks right (and works perfectly) and fitted a nice 3-9x40mm scope (after some adjustment of the 20mm mounts with a file). The rifle is shooting well and still producing 10.7 ft.lbf, so I think your advice to leave the internals alone for the time being was sound. It is ideal for those pigeons in the silver birch trees.
    Alan
     

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