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Thread: Romanian '3' Front Trunion

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    GuncoHolic Tommo's Avatar
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    Default Romanian '3' Front Trunion

    Have a Romanian front trunion that is stamped with a '3' on the top flat area where the rear sight base goes over it. It is easy to push a standard size Romanian barrel into it with light finger pressure. Are there any barrels available to fit this oversized trunion?

    Thank you very much in advance for any information.

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    Gunco Regular akblue's Avatar
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    Romanian barrels are journal marked as well. The average or nominal seems to be a '2' looks like you need a '3' or...,

    A hand knurler., can also be done by hand with a sharpened punch and hammer>

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    GuncoHolic Sprat's Avatar
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    I was going to recommend that earlier the same technique, old time smiths called it stippling the term knurling works too
    the tolerances are to tight to do anything else here
    Last edited by Sprat; 03-15-2013 at 12:08 PM. Reason: misspelled word: it was a long day
    Sprat and sprat1 are one and the same.

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    3/6 Infantry mtdew's Avatar
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    I had one like that, trun and bbl from diff rifles. What the boys said about stippling is what I did, I dont have a lathe to knurl. Just punch where the bbl and trun contact a coupla hundred times, the metal around the punch mark will raise and give you a good press fit.The pic shows really agressive stippling, u dont have to punch that close together, but the more the better.
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    Indian Admin Winn R's Avatar
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    another trick is to use the aluminum tape applied by hvac contractors. .003" if I remember correctly. Just enough for a good interference fit.
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    Gunco Regular akblue's Avatar
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    The hand knurling tool does not require any other tools. For $39 plus ship it is a handy tool for any less than adequate interference fit.
    So tape can be actually used in a press fit barrel? Seems like it woud simply push out of the journal or trunnion vs stand up the 1,000's of pounds of interference press? But if that works it is a good idea. Just never saw it used.

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    3/6 Infantry mtdew's Avatar
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    Quote Originally Posted by akblue View Post
    The hand knurling tool does not require any other tools. For $39 plus ship it is a handy tool for any less than adequate interference fit.
    So tape can be actually used in a press fit barrel? Seems like it woud simply push out of the journal or trunnion vs stand up the 1,000's of pounds of interference press? But if that works it is a good idea. Just never saw it used.
    I learn something new everyday. I need to get a hand knurling tool. We would knurl on the lathe in high school shop. Good to know, wish I had known earlier, would have saved me much time and labor.Thanks again, blue.
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    Gunco Rookie jlh1's Avatar
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    what if you stippled and then used the tape?
    would it not fill in the voids in the stippling and make it stronger?

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    GuncoHolic Sprat's Avatar
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    I kinda a gree with blue how does the alum tape stay on once you start pressing the barrel into the trunnion, stippling with a hand tool is fairly easy, no need for expensive tools, the work MTDEW pictures we did that on the alum and steel sig p-228/9 pistol frames for better grip, when we did the big build program back 2004 era just a steel punch and hammer
    smiths have been doing this for many moons for realign open break shotguns and lose sights
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    Gunco Regular Ken3030's Avatar
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    Inquiring minds want to know. I would like to see how you get alum tape to stay on something you are press fitting?
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