VZ-52 Conversion Kit to 7.62x39

Andy

Andy

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Bought from Numrich in the US for about $40 shipped - took a week to arrive. Converts your VZ-52 chamber such that you can fire the common 7.62x39 ammo rather than its original rare 7.62x45. Essentially a small sleeve is glued in place using Loctite. Adds about 1/4" of additional freebore and blows out the shoulder from about 0.394" to 0.422" (sort of a 7.62x39 "Improved").

I shot mine today and it worked - ammo all fired and sleeve stayed in place. It didn't eject the cartridges, but I can't blame that on the conversion kit, as it was the first time I fired the gun, and it needs some tweaking (lubing, ammo selection, etc). It will extract and eject if you do it manually, so I suspect that the ammo isn't "hot" enough to force the action back with enough force. The freebore, oversized chamber and cold weather all conspire to reduce pressure. I'll have to try some handloads

The instructions shown below explain how it's installed.

What you get

762X45_762X39_Conversion_Kit.jpg


L- 7.62x45 R - 7.62x39

762X45_762X39_Comparison.jpg


With Sleeve in place

762X45_762x39_With_Sleeve.jpg


The Instructions

762x45_to_762X39_Conversion_Instructions_Page_1.jpg


762x45_to_762X39_Conversion_Instructions_Page_2.jpg
 
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i have wondered about these.

think the insert will cause problems with corrosive ammo? ie a ring in the chamber? or does it matter as all the VZ52's i've seen have been in "used" condition?

neat way to get them up and running though, without having to source/make some obscure brass that will be easily lost.
 
I have some 7.62x45 dies and boxer brass on the way, and can make more from 6.5x52 Carcano brass, so I just did this out of curiosity. I mop my barrel and chamber out pretty well, so the corrosive element shouldn't be a big deal, plus, the one I added the sleeve to is "very experienced", a working parts gun as it were.

I do want to get it ejecting properly, so might run some stouter loads through it, and maybe mess with some cast loads too.
 
I have not had anything to do with the 52, so don't know if is
doable, but instead of screwing around hand loading 7.62/39
could you install a sks weight mainspring instead.(ie lighter weight)
marshall
 
marshall said:
I have not had anything to do with the 52, so don't know if is
doable, but instead of screwing around hand loading 7.62/39
could you install a sks weight mainspring instead.(ie lighter weight)
marshall
Click to expand...

I could experiment with the spring by cutting off small lengths in increments until it ejects, but the problem with that approach is that the same spring drives the bolt forward to strip off the next round and chamber it, and you will weaken that action.

"Screwing around hand loading 7.62X39". I don't consider handloading a last resort when cheap milsurp is not available. I enjoy it, and can produce far superior accuracy at similar prices - my only investment is my time (and like I said I enjoy it).
 
do you shoot on an indoor range? i can't imagine "making" brass, shooting it in a semi, and then looking in the grass for it. but, good on ya, i guess that is what seperates those that do from those that don't.

this thread makes we want to go and play with my VZ52/57.
 
If memory doesn't fail me, there's a big nut on the barrel forward of the gas piston - tighten it toward the receiver to boost the gas. Try a turn or 2 to start.
 
reminds me of a similar item to convert m1 garand from 30-06 to 308 calibre....invented used in mid 60s/vietnam era by usa navy.
i tried 1 never did work really well and always the chance of it tearing loose.
i think this is a different idea based obn that theme.
 
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