rear trunnion problem

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[ARCHIVED THREAD] - rear trunnion problem

Posted: 8/20/2005 5:20:07 AM EDT

Rear trunnion holes don't line up with the reciever holes. There is a good 1/2 inch difference. I thought it was the reciever but holes are in the same place as my other assembled AK. I have a bulgarian parts kit and a vulcan reciever stamped 7.62 X 39 and the kit is for 5.45. That shouldn't be the problem. The rear trunnion just looks longer than it should be. What to do?

Posted: 8/20/2005 6:00:06 AM EDT

[#1]

Its the simple fact that the Bulgarian trunnion is different. The Vulcan receiver is cut for standard 47 trunnions. The easy fix is to buy a new trunnion.

Posted: 8/20/2005 8:58:46 AM EDT

[#2]

Thanks.

Posted: 8/22/2005 4:26:42 AM EDT

[#3]

Quoted:
I have a bulgarian parts kit and a vulcan reciever stamped 7.62 X 39 and the kit is for 5.45. That shouldn't be the problem.

Sorry, but that is a problem.
The 47 ejector is shorter than a 74 ejector.
You will need to build it up with a mig welder then trim to fit.

Posted: 8/22/2005 4:39:39 AM EDT

[#4]

Quoted:
Its the simple fact that the Bulgarian trunnion is different. The Vulcan receiver is cut for standard 47 trunnions. The easy fix is to buy a new trunnion.

Not just the bulgy's, all 74's are different than 47's.
Top hole location is the same, the lower is different

Posted: 8/22/2005 4:41:16 AM EDT

[#5]

It's not a problem on a Vulcan. You have to trim them down for the 47. This way the receiver can be used for either build.

Posted: 8/22/2005 12:27:33 PM EDT

[#6]

I thought the vulcan universal receivers had no caliber designation on them?
Or am I thinking of someone else's?

Posted: 8/22/2005 12:34:05 PM EDT

[#7]

I've personally built 4 guns on Vulcan receivers.

If it says 7.62, then the ejector is short enough for a 7.62 and too short for a 5.56.

To the best of my knowledge, they don't make a 'universal' receiver

Posted: 8/22/2005 12:46:23 PM EDT

[#8]

I've built seven on "7.62" Vulacan receivers and all but the 74 had to be filed down.

Posted: 8/23/2005 6:29:21 AM EDT

[#9]

So can I just get a romanian rear trunnion or do I just get a reciever marked 5.45?

Posted: 8/23/2005 6:38:06 AM EDT

[#10]

Quoted:
I've personally built 4 guns on Vulcan receivers.

If it says 7.62, then the ejector is short enough for a 7.62 and too short for a 5.56.

To the best of my knowledge, they don't make a 'universal' receiver

I just checked their site.
They still offer a universal 47/74 receiver, but only for the underfolder.
It appears that they no longer offer the universal in a fixed stock design.

Vulcan Arms AK47/74 Receiver Underfolder #VL001

NOW IN STOCK! These blued receivers come with the X & Y axis marked, all holes pre-drilled and the rails installed. Has cuts for Polish type underfolder stock. The rails are long enough to build up an AK47 or AK74. These receivers come with a standard ejector rail. We will heat treat the ejector rail for $5 more on this limited group buy. Buy 10+ and we will give you an extra $2 off each receiver!!! FFL Required!

Posted: 8/23/2005 6:41:02 AM EDT

[#11]

I just had my Bulgarian 74 built on a 7.62 marked Vulcan receiver. You just need to get a standard trunnion. The Romanian will work.

Posted: 8/24/2005 5:01:06 PM EDT

[#12]

thats a relief

[ARCHIVED THREAD] - rear trunnion problem

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