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Thread: No 4 Mk1 Trials Rifle Rear Sight Plunger & Spring

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  1. #1
    Contributing Member waco16's Avatar
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    No 4 Mk1 Trials Rifle Rear Sight Plunger & Spring

    A favour from members who are lucky enough to own a trials rifle with its original rear sight.....



    I'm after the details of the spring and plunger (dimensional details ideally)

    Many Thanks

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    Contributing Member bravo2zero's Avatar
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    Do you just have a ladder that you are looking to make up into a fully working sight?

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    Contributing Member waco16's Avatar
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    Thread Starter
    Yes
    After quite a few years of searching I've got a ladder on its way

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    Contributing Member bravo2zero's Avatar
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    Me too, from the States?

    ---------- Post added at 07:59 PM ---------- Previous post was at 07:59 PM ----------

    I will be doing the same as you

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    Advisory Panel Surpmil's Avatar
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    There's no plunger, it's only a ball bearing and if you measure the hole with a vernier or plug gauge you'll find out what size is required. I'm afraid I don't recall except that it is possibly a few thou larger than the major diameter of the shank on the later plungers. The ball bearing idea wasn't a great one as the small contact area no doubt soon led to deformation of the hole and looseness in the sights.

    A plain cylindrical plunger made up with a half round end would be another option if the hole is too badly worn at the top to hold the sight consistently enough for shooting - if one wanted to shoot such a rifle.
    "Men occasionally stumble over the truth, but most pick themselves up and hurry off as if nothing had happened." W.L.S.C..

    "None need deceive a people determined to deceive themselves."

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    Contributing Member waco16's Avatar
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    Thread Starter
    Indeed
    Coming home, as the rifle its going on did

  11. #7
    Advisory Panel browningautorifle's Avatar
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    Quote Originally Posted by waco16 View Post
    details of the spring and plunger
    Are they so different from the No 4?
    Regards, Jim

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    Contributing Member waco16's Avatar
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    Quote Originally Posted by browningautorifleicon View Post
    Are they so different from the No 4?
    Very different
    Trials rifle rear sights had circular cutouts for a ball detent for the raised and lowered positions

    Std production No4 sights had flats that rested on the familiar spring loaded 'top hat'

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  14. #9
    Advisory Panel browningautorifle's Avatar
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    Quote Originally Posted by waco16 View Post
    Very different
    No matter how I looked I couldn't find detail on them... The standard sights I have...
    Regards, Jim

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    Contributing Member 303 Gunner's Avatar
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    I'll try to get ahold of a micrometer this week and take mine apart.

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