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Thread: Some fun with a commercial VZ-58

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  1. #1
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    Some fun with a commercial VZ-58

    In case anyone's interested, here's my latest attempt to mate a POSP scope to a VZ58.

    Here is a "before" shot:


    I went with a SVD-type mount for the basis of the project. This will be a permanent mod for a VZ58-type rifle to allow mounting of any POSP up to 6X. Larger objectives won't work as they would be too low the the handguard.



    Anyhow, first step is to modify a standard POSP SVD mounting plate. This started out as the standard version sold by East Wave. About 1/8" had been milled off the top to fit the milled lightening cut height on the VZ sidewall and clear the lower pins.

    Also, I positioned it laterally to get the right eye relief on either a 4X or 6X POSP using an NEA stock adaptor and AR stock, which is a bit longer length of pull than the standard stock. I didn't want to have to remove anything to strip the internals, so recesses are milled into the mount to allow the trigger group pins to be punched out.

    Additionally, I had to mill a step precisely into the back of the mount to account for the stepped height of the receiver side wall.

    This photo gives a good idea of what it will ultimately look like:


    Next, you can see the back of the mount that better illustrates the pin relief holes and the stepped shape of the back of the mount to allow for the receiver step:



    Note that none of the holes are co-located with the POSP bearing surfaces. the critical area is about mid-way along the bottom part of the dovetail where the POSP cam locks to the mount.

    This next bit is not for the squeamish and is definitely the "point of no return".

    Fresh from the welder:

    Look at those nice full-penetration TIG welds:

    This is how I made sure the serial number is still visible on the rifle (yes, part is photoshopped out):

    Tial fit:

    This really shows the minimized offset:

    Look at that tight 5 thou clearance between to mount arms and the receiver sidewall!

    Bottom of mount flush with top of trigger guard, fo you lefties out there...

    And after a little cleanup with file and paper:


    With the scope offset minimized, I had to fab up a shell deflector.

    Started with a chunk of 1018 cold rolled steel and the mill:


    Here it is clipped under the rear sight leaf:



    Next, I cut a piece of 1018 hot-rolled bar stock and milled some lightening cuts into it and MIG welded it to the rear sight wedge:



    Finally, I fabbed up a piece of 1020 colled rolled sheet steel into a deflection shield, drilled some plug weld holes into the tab and then plug welded it to the support arm, then dressed the welds down with an angle grinder and finished dressing it with a file:



    And here it is mocked up:







    I still have to finish it, probably parkerize it or nitro-carburize it. Not sure yet. It fits nice and tight as it's milled with only a couple thou clearance to the slide and the machining on the bottom fits the spring recess for the rear sight perfectly. The spring tension keeps the deflector in place and it has just enough give to it that it should absorb all the shock of being hit by shells without ever getting near the scope
    Last edited by Claven2; 01-04-2011 at 07:51 PM.
    Союз нерушимый республик свободных Сплотила навеки Великая Русь. Да здравствует созданный волей народов Единый, могучий Советский Союз!

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    Nice work.

    The edge of the shell deflector looks like an awesome hand slicer, too.

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    Pretty nice job you've done. That looks like a busy work bench you have!

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    Quote Originally Posted by tbonesmithicon View Post
    Pretty nice job you've done. That looks like a busy work bench you have!
    Yeah, there's about two M14icon's worth of parts and one and a half VZ58's strewn across the bench at present - should have cleaned it up a little first! LOL.

    As for the deflector, I did dull the edges with a file.
    Союз нерушимый республик свободных Сплотила навеки Великая Русь. Да здравствует созданный волей народов Единый, могучий Советский Союз!

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    Quote Originally Posted by Stevo View Post
    Nice work.

    The edge of the shell deflector looks like an awesome hand slicer, too.
    I've done some thinking about this today and I might have an innovative way to reduce the slice factor... More later tonight.
    Союз нерушимый республик свободных Сплотила навеки Великая Русь. Да здравствует созданный волей народов Единый, могучий Советский Союз!

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    Quote Originally Posted by Claven2 View Post
    I've done some thinking about this today and I might have an innovative way to reduce the slice factor... More later tonight.
    That's good.

    I always wear gloves when I shoot my rifles, but that thin steel edge would still make me jumpy.

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    Very much so! Roll it over or add a bead of some sort. Just how far does it need to protrude?

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    ok, rolled edge it is...

    Союз нерушимый республик свободных Сплотила навеки Великая Русь. Да здравствует созданный волей народов Единый, могучий Советский Союз!

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    Fancy-schmancy.

    I would have just wrapped the scope in an inch of duct tape to soften the blow. I'm curious to see how well it works to redirect the empties.

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    Me too! With Leo being only 2 months, my range time has been uber-limited

    It should work well though, I'm not deflecting the ejection angle by very much.
    Союз нерушимый республик свободных Сплотила навеки Великая Русь. Да здравствует созданный волей народов Единый, могучий Советский Союз!

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