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Contributing Member
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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Thank You to waco16 For This Useful Post:
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06-21-2020 06:22 AM
# ADS
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Contributing Member
Do you just have a ladder that you are looking to make up into a fully working sight?
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Contributing Member
Yes
After quite a few years of searching I've got a ladder on its way
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Contributing Member
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
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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The Following 2 Members Say Thank You to Surpmil For This Useful Post:
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Contributing Member
Indeed
Coming home, as the rifle its going on did
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Advisory Panel

Originally Posted by
waco16
details of the spring and plunger
Are they so different from the No 4?
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Contributing Member
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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The Following 2 Members Say Thank You to waco16 For This Useful Post:
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Advisory Panel

Originally Posted by
waco16
Very different
No matter how I looked I couldn't find detail on them... The standard sights I have...
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Contributing Member
I'll try to get ahold of a micrometer this week and take mine apart.
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Thank You to 303 Gunner For This Useful Post: