Lee Enfield question

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Can someone tell me what the purpose is of the screw in the centre of the picture on this #5 JC. ??? It's the same as my other 2 #4's other than scope mounting I can't see a purpose.
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Points for points. Got it in one.

If you look inside you'll see it protrudes slightly, just enough that when the bolt pulls the empty case back to that point it strikes that ejector screw which channels the impact energy to knock it out from the extractor and out the side.
 
Interesting, I was just putting one of "GAIRLOCHIAN" 's "no drill" scope mounts on a #4. I may have to get a longer screw now. what type thread is that screw ??? It seems a bit odd.
 
BA

British Association

Metric pitch specs with 47-1/2-degree V.

Not your usual type of fish.

Should be able to get taps and dies at a machinists' supply. I have a set here that walked out of Long Branch, many years ago, but that doesn't help you.
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Shouldn't be too much of a problem. BA threads are quite popular with model engineers and were, once upon a time, pretty much a British standard which got all upset by the Unified threads in the '60s, then screwed totally (as we were) by Metric.

Should be fairly easy to get what you need at a machinists' supply or your local machine shop might be able to do them. The one you need is a 3 BA, just a tad longer than the original. Who knows, they might even have a screw that you can alter.
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If you can find a scrap Lee Enfield buttplate, the screw that holds the trap spring will work for you.
 
The ejector screw is actually used for ejecting drill or live rounds, fired cases are ejected long before they reach the screw.
Try it, but please for safety, (if trying at home) use only fired cases & inert/drill rounds.
 
Good to know. As luck happens I found a screw in a junk box of screws. Only one, but that's enough. what are the odds of that. :D just had to shorten and re-blue. Thanks guy's :cheers: Jack
 
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