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  #1  
Old 10-29-2019, 11:20 AM
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Screw threads? International Mk4/5



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Hi there. I've just picked up a rather sad looking MK5 international. It's missing the sight mounting block and mounting screws that attach to the left side of the receiver.

Can anyone tell me what thread the screws are?

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  #2  
Old 10-29-2019, 12:10 PM
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My guess is the same as the MKIII, 10-32.
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Old 10-29-2019, 05:45 PM
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Steve Earl sells the mounting block and screw for a reasonable price. Not worth bothering trying to find them at a hardware store. http://www.steveearleproducts.com/otherscopemounts.html
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Old 10-29-2019, 05:45 PM
rapidfire10ring
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BTW, Where did you get the Mk. V and how much did it cost you?
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Old 10-29-2019, 06:43 PM
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Originally Posted by rapidfire10ring View Post
BTW, Where did you get the Mk. V and how much did it cost you?
Thanks for the link there - Unfortunately I'm in the UK but I should be able to track some down over here.

I picked up the Mk5 locally, I'd been looking around for one to repurpose as a benchrest rifle (My prone/sling days are a distant memory).

The gunshop was asking 100 (about $120) but I traded in an old pump shotgun and gave him 50.

Although the bluing is a bit thin in places and the stock has been knocked about it's all sound, and the action/ejection is crisp. I've looked though the barrel with a borescope and looks good with just a bit of leading showing.

I had a Mk2 back in the 1970's that shot very well but swapped it for a fancy German bolt action that didn't shoot any better.

(I've also got a Martini action Greener GP 12g shotgun that's fun to shoot)

This evening I've been machining up a bracket to take a scope rail for the new rifle.
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Old 10-29-2019, 06:58 PM
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Ive dug into my bins for screws to trial-fit on more than one occasion.....or used a little scrap of hardwood, 3 or 4 whittled sides, to screw in and remove to read the tpi on my gauge. The 3 or 4 sides screw in/out much easier than trying to do so with a full minor dia. plug and show the thread impression just as well.
Btw, I believe it is a 5mm x .80 metric that is a reasonable next oversize for a loose 10-32.

Last edited by gcrank1; 10-29-2019 at 07:38 PM.
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Old 10-30-2019, 09:38 AM
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Originally Posted by gcrank1 View Post
Ive dug into my bins for screws to trial-fit on more than one occasion.....or used a little scrap of hardwood, 3 or 4 whittled sides, to screw in and remove to read the tpi on my gauge. The 3 or 4 sides screw in/out much easier than trying to do so with a full minor dia. plug and show the thread impression just as well.
Btw, I believe it is a 5mm x .80 metric that is a reasonable next oversize for a loose 10-32.
Yes thanks. I've gone with M5 x.80. A good fit. If I can get the scope bracket finished today I will have chance to put a few rounds through it Thursday.
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Old 10-30-2019, 09:47 AM
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I think the parts you require are easily available in the UK.

If memory serves me right, there are several online parts dealers, air-gun rifle or something similar comes to mind.

http://shootingshed.co.uk/oscom/prod...products_id=61

https://rifleman.org.uk/BSA_Martini_...IV_&_%20V.html

Best of luck.

Giz

EDIT - try John Knibbs, Airgunspares.com

Last edited by Gizmo60; 10-30-2019 at 10:00 AM.
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Old 10-30-2019, 04:52 PM
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Well, I've made a quick bracket and banged on a spare scope. I'll give it a go tomorrow and see if it has any potential.


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Old 10-30-2019, 06:38 PM
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Question

Any ejection problems with that type of mount?
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  #11  
Old 10-30-2019, 08:03 PM
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Nice job, it should work ok, basically based on the same design as commercial products already out there.

Best of luck.

Giz
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Old 10-31-2019, 09:54 AM
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Nice job, it should work ok, basically based on the same design as commercial products already out there.

Best of luck.

Giz
It's the obvious way to fit a bracket on the Mk4/5 unless the sight blocks are already fitted. This was just a quick job with the aluminium cut from bit of box section I had.

Now I've had a quick shoot I'll make a sturdier version. I shot it this morning for the first time at 25 yards (all that was available at the moment) I was using a cheap Chinese scope, 2.5-10 x 40 but unfortunately I couldn't adjust the parallax down to 25 yards so a bit of guess work needed.

After a few shots to settle the barrel down after a deep clean and to get it sighted in I shot a few 5 shot groups then a NSRA 25 yard prone card (shot from the bench) and produced a 99, using Eley Match ammo.

So, please with the way it shot and looking forward to tinkering around to screw a little more out of it.


5 shot group

same group with a case pushed in.

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  #13  
Old 10-31-2019, 10:05 AM
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Sweet!
Ime it either gets better or worse from the encouraging first trials....
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Old 10-31-2019, 07:41 PM
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A keeper for sure, she should do well at 50yds.

Most BSA's just love Eley ammo, then again UK rifle and UK ammo.

Giz
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Old 11-01-2019, 02:57 AM
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Very nice, my club recently sold a Mk IV for benchrest shooting.

You might want to gauge the middle left diagram though. Eley EPS cuts quite small holes in current NSRA cards, and it looks too close to the line to score by eye.
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