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Thread: Curious Spacer Re: Re-welding demil into Semi-auto

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  1. #1
    Really Senior Member Joe H's Avatar
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    Curious Spacer Re: Re-welding demil into Semi-auto

    I was milling a demilled section of a Monotype Mk II receiver that had been converted to a L4A3. At the rear face of the barrel nut a spacer fell out.

    The donor piece I am going to weld in did not have a spacer but one of the other demill bits & pieces I have did.

    Never noticed this before mainly because previous demills had different cuts.

    Pics below show the original demilled section and the spacer and recess for the spacer.

    Manufacturing screw up or ?????

    Joe
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    Really Senior Member TactAdv's Avatar
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    Quote Originally Posted by Joe H View Post
    I was milling a demilled section of a Monotype Mk II receiver that had been converted to a L4A3. At the rear face of the barrel nut a spacer fell out.

    The donor piece I am going to weld in did not have a spacer but one of the other demill bits & pieces I have did.

    Never noticed this before mainly because previous demills had different cuts.

    Pics below show the original demilled section and the spacer and recess for the spacer.

    Manufacturing screw up or ?????



    Joe
    Interesting. I have an uncut, unmolested, factory original '42 Daimler-Monotype MkII that I can go take a look at, if you want?? I have never noticed such a thing, but then again I've never really looked at that location for a piece like that either.
    -TomH

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    Really Senior Member Brit plumber's Avatar
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    I think these have been mentioned before, to repair worn barrel seats.

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    Really Senior Member Joe H's Avatar
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    Thread Starter
    Tom,

    No need to check I think Brit has the answer I was looking for. I didn't notice this on the MK II kit I have but I did see that there probably was an insert on a another piece of de-milled scrap from my junk pile.

    Also, the insert was hardened.

    Joe
    Last edited by Joe H; 11-20-2017 at 08:03 AM.

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    Peter Laidler's Avatar
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    Brit Plumber has it correctly. It is to give a new lease of life to worn out Mk2 guns where it was impossible to tighten the barrels. Only needy guns had them and they would come loose in service on the Mk2/1 guns


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