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Old 05-17-2018, 08:16 PM   #1
Cerephim
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Default Interest in a 7.62x39 thin stem bolt

I'm in the process of selling my last 5.56x45 thin stem bolt.

I am very seriously considering reproducing a Saiga 7.62x39 thin stem bolt. I just put the stripped Saiga bolt in my .308 Vepr, and it locks up without any hang up anywhere, so I'm pretty sure the repro would work in a Vepr too.

Is there any interest in this project out there?

Do you think a spring loaded firing pin is necessary given that more and more American ammo manufacturers are loading the x39 cartridge? Any chance they'll have wimpy primers?

Let me know whatcha think.

Cross posted in AK-47 forum.
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Old 05-21-2018, 01:07 PM   #2
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Wow, I guess no one wants a backup bolt for their Saiga, Vepr, or AK-100 series.
And no one is interested in making an AK-100 series clone.

Maybe I'll rethink this.
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Old 05-21-2018, 03:07 PM   #3
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I would think they’d sell if you offered them, some guys like to have spares and there is no suitable substitute available for a ak104/103. Probably not in volume or quickly, but I think they’d move. What would be necessary beyond opening up the bolt face of one of your 5.56 bolts?
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Old 05-21-2018, 03:33 PM   #4
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I would be interested in one depending on price.
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Old 05-22-2018, 01:06 PM   #5
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Quote:
Originally Posted by es View Post
I would think they’d sell if you offered them, some guys like to have spares and there is no suitable substitute available for a ak104/103. Probably not in volume or quickly, but I think they’d move. What would be necessary beyond opening up the bolt face of one of your 5.56 bolts?
Excellent thought! However, the "chin" of the 7.62 bolt is longer than on the 5.56 bolt. I'm defining "chin" as the portion of the bolt that picks up the fresh round from the mag, and pushes it into the chamber. If it were shorter, I could have some material removed. But adding material and then milling it to spec makes the cost prohibitive. I'd have to farm that work out. Then there is the difficulty of the heat of adding material messing up the hardness.
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Old 05-22-2018, 06:42 PM   #6
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Ah, I don’t have any 7.62 saiga or veprs so I wasn’t sure. I didn’t mean literally modifying one of your current bolts though, just that it shouldn’t be too difficult to tweak the design to 7.62 specs since you’ve already got the 5.56 already figured out. I’d suggest maybe posting a thread up in gunsmithing where it’s a little more visible to better gauge interest
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Old 05-22-2018, 09:31 PM   #7
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you would only want 5.56 bolts to have spring for the pin.. 7.62x39 is always loaded with hard primers even in the us.

Quote:
Originally Posted by Cerephim View Post
I'm in the process of selling my last 5.56x45 thin stem bolt.

I am very seriously considering reproducing a Saiga 7.62x39 thin stem bolt. I just put the stripped Saiga bolt in my .308 Vepr, and it locks up without any hang up anywhere, so I'm pretty sure the repro would work in a Vepr too.

Is there any interest in this project out there?

Do you think a spring loaded firing pin is necessary given that more and more American ammo manufacturers are loading the x39 cartridge? Any chance they'll have wimpy primers?

Let me know whatcha think.

Cross posted in AK-47 forum.
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Old 05-23-2018, 11:29 AM   #8
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Originally Posted by 762xATX View Post
I would be interested in one depending on price.
What he said...
I'd be interested in a couple depending on cost
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Old 05-23-2018, 12:59 PM   #9
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I also would be in for a backup or two for my Saiga’s depending on price, I’ve never had a problem with a regular firing pin so personally wouldn’t want a spring loaded one.
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Old 05-23-2018, 02:57 PM   #10
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The bolt forging is the same at the factory for the bolts, your current models should be easily adapted to the 7.62 by opening up the face of the bolt and making the channel / firing pin hole the correct size for the 7.62 pin. You could also just make some 5.45 bolts too if you wanted.

Quote:
Originally Posted by Cerephim View Post
I'm in the process of selling my last 5.56x45 thin stem bolt.

I am very seriously considering reproducing a Saiga 7.62x39 thin stem bolt. I just put the stripped Saiga bolt in my .308 Vepr, and it locks up without any hang up anywhere, so I'm pretty sure the repro would work in a Vepr too.

Is there any interest in this project out there?

Do you think a spring loaded firing pin is necessary given that more and more American ammo manufacturers are loading the x39 cartridge? Any chance they'll have wimpy primers?

Let me know whatcha think.

Cross posted in AK-47 forum.
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Old 05-25-2018, 05:23 PM   #11
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I would be interested in a spare for my 7.62x39 Vepr, but I want something made to fit it specifically, not something that "should work" or something that was made for another rifle and hacked/modded to kinda work in a Vepr.
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Old 05-30-2018, 06:21 PM   #12
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Quote:
Originally Posted by Dragynn View Post
I would be interested in a spare for my 7.62x39 Vepr, but I want something made to fit it specifically, not something that "should work" or something that was made for another rifle and hacked/modded to kinda work in a Vepr.
I'm going to see if I can round up a Vepr bolt for comparison. If I can reverse engineer the Vepr bolt and it'll work in a Saiga, that may be the route I take. Time will tell.
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Old 05-30-2018, 09:36 PM   #13
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I have a new 762 saiga bolt in my spares you can borrow

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Originally Posted by Cerephim View Post
I'm going to see if I can round up a Vepr bolt for comparison. If I can reverse engineer the Vepr bolt and it'll work in a Saiga, that may be the route I take. Time will tell.
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Old 05-30-2018, 10:49 PM   #14
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Quote:
Originally Posted by Cerephim View Post
I'm going to see if I can round up a Vepr bolt for comparison. If I can reverse engineer the Vepr bolt and it'll work in a Saiga, that may be the route I take. Time will tell.
I have switched bolts in my 7.62 vepr and saiga. Was able to hand cycle a 30 round mag in each without any problems. FWIW
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Old 06-09-2018, 09:21 AM   #15
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Quote:
Originally Posted by Dragynn View Post
I would be interested in a spare for my 7.62x39 Vepr, but I want something made to fit it specifically, not something that "should work" or something that was made for another rifle and hacked/modded to kinda work in a Vepr.
A Vepr bolt is on its way to the Engineering firm for laser scanning and modeling.
The Vepr and Saiga bolts are identical in most respects, but there are some subtle differences. And since I have a customer committed to multiple bolt purchases, I've decided to go with the Vepr, which *does* have a spring loaded firing pin.

However, I am confident the either bolt will work flawlessly in the other rifle.
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Last edited by Cerephim; 06-09-2018 at 10:10 AM. Reason: spring loaded firing pin
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Old 06-10-2018, 04:30 PM   #16
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Quote:
Originally Posted by Cerephim View Post
A Vepr bolt is on its way to the Engineering firm for laser scanning and modeling.
The Vepr and Saiga bolts are identical in most respects, but there are some subtle differences. And since I have a customer committed to multiple bolt purchases, I've decided to go with the Vepr, which *does* have a spring loaded firing pin.

However, I am confident the either bolt will work flawlessly in the other rifle.
Wow, that's awesome, thank you for doing that, sorry I didn't see your first reply earlier or I would have offered my Vepr bolt up for testing/R&D.

Count me in for one when done, actually would be interested in a package deal if possible of the bolt and one of your spring-loaded firing pins for it.
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Old 06-15-2018, 11:03 PM   #17
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Wow, that's awesome, thank you for doing that, sorry I didn't see your first reply earlier or I would have offered my Vepr bolt up for testing/R&D.

Count me in for one when done, actually would be interested in a package deal if possible of the bolt and one of your spring-loaded firing pins for it.
I only sell the bolts as a complete unit: bolt, firing pin, firing pin spring and collar, extractor, extractor pin, extractor spring, and firing pin retaining pin.
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Old 06-16-2018, 06:41 AM   #18
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Quote:
Originally Posted by Cerephim View Post
A Vepr bolt is on its way to the Engineering firm for laser scanning and modeling.
The Vepr and Saiga bolts are identical in most respects, but there are some subtle differences. And since I have a customer committed to multiple bolt purchases, I've decided to go with the Vepr, which *does* have a spring loaded firing pin.

However, I am confident the either bolt will work flawlessly in the other rifle.
Outstanding!
Any idea on the estimated selling cost?
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Old 06-18-2018, 09:02 PM   #19
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Outstanding!
Any idea on the estimated selling cost?
My .223 bolts sold for $175ea. I'll probably use that price for these too, if things turn out the way I believe they should.
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Old 07-05-2018, 08:52 AM   #20
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I am waiting for that one from you (for a long time), count me in for one for sure.
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Old 07-05-2018, 08:59 AM   #21
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Possibly interested here, too.
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