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Thread: vz-58 conversion

  1. #11
    Gunco Veteran jreifsch80's Avatar
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    ok thanks for the advice i might be able to convince welldog to work with me on this conversion also i'm going to look into making the lug on my repair plates bigger and might make the falling block out of some very strong steel and with larger lugs as well miught not be too hard

  2. #12
    Gunco Regular allesennogwat's Avatar
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    7.62x51 and 5.56x45 experimental versions.
    Attached Images Attached Images

  3. #13
    Gunco Regular allesennogwat's Avatar
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    Translation from Czech. The model 67 was in 7.62x51, developed in 1966, and the model 70 was in 5.56x45.

    Automatic rifle from the 70



    Not long after the introduction of the Model 58 Assault weapons CSLA our engineers redesigned the automatic rifle to a standard charge of NATO - 7,62 x51mm. This gun came from marking the 67th
    At this time we got to the M16 rifles captured in a new caliber of the Vietnam War, along with the ammunition. It was an adjustment of the Model 58 Assault on the type of charge.
    One of the problems in this development was the unavailability of drawings nábojových chambers and major holes in this caliber. Designers, therefore, the value obtained is the M16 rifles captured in Vietnam. Barrel length has been optimized for low dispersion. A similar situation was to charge 5.56 x45mm, Blanická strojirny also used to develop M193 ammunition captured.
    Development of 70 rifles began in December 1970. You have chosen a basis in vz.58 Assault infantry models with fixed stock. Originated two versions of these weapons. One version was the muzzle attachment for firing rifle grenades and the second compensator (similar to that of AKM weapons), which could be to replace the cap for firing rifle grenades.

    The differences between the AP 70 and a machine gun vz.58:

    Actual case concludes with pažbením (stock, forearm and nadpažbí) and the trigger mechanism was preserved. Therefore, it can be deployed in case the original container.
    Changes to touch either the piston and the expansion sleeve.
    The actual double-column magazine with a capacity of 30 rounds segmental retaining shape but with a smaller curvature and its length was a little smaller.
    As stated above, this one change has been mainly using ending with another mouth. The version with fixed nozzle for firing rifle grenades were equipped with folding bead sight for firing grenades. Version with a removable cap, these sights mounted directly on the attachment.
    Curve visor had to be adjusted for different external balistku charge M193.
    Carrier závorník remained almost unchanged up to the slot for inserting small strips of nábojových 5.56x45 ammunition. For závorníku was made the largest number of changes. In addition to changing the actual dimensions of the bed on the bottom of the new charges, pleaded change the extractor and pin. Pin was unlike Assault vz.58 secured transverse pin.

    Tests of automatic rifles from the 70:

    This weapon has undergone extensive comparison tests with a machine gun and automatic rifle vz.58 M16.
    Tests showed better control weapons using ammunition 5.56x45mm. The difference was significant mainly in firing rate. Tests showed that vz.58 Assault is using the same ammunition equivalent M16 rifle.

  4. #14
    Happy Camper hcpookie's Avatar
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    Assuming this is a parts kit build, you could machine an insert since as moleman suggests the lugs will have to be farther back, or you're going to need a barrel extension of some sort. Basically you're going to have to make your own repair section so the longer rounds will work properly. The springs should work OK as will the rest of the rifle, just the longer repair section and obviously longer magazine well. If you DO make your own repair section you should make sure the locking lug area is made of good steel. The lugs should be heat treated and stress-relieved as well after you finish welding the repair section. If the welds are done up GOOD then the only concern will be how well the locking lugs will hold up against the stress of the hotter round. Tough call there, I'd really get good welds, don't paint it, and inspect for cracks in-between shots for the first few dozen rounds. If the headspace remains consistent then you should be comfortable firing it as the receiver isn't stretching.

    May just be easier to build an entire new receiver if you get the prints and lengthen that area. Buy a chunk of 4140 steel and a bag full of carbide cutters and go to it. Properly heat treat that baby and never look back.
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  5. #15
    Gunco Veteran jreifsch80's Avatar
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    sorry forgot about this thread i started for a bit, got the full prints for a vz receiver as well as some cad drawings. so now i have visions .308 and 8x57 vz-58s dancing around my head lol

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