Help with ID on AK Bolt Carrier

[tujungatoes]

Looks like milled receiver yugo to me.

[hellayella]

I got as far as Yugo...

[highpowermatch]

What kind of Romanian AK are you trying to install this into?

It's a Romanian Guard.

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[ott1]

Only the Yugo's, Bulgarian milled, and Chinese? Use a stainless steel bolt and carrier. (Might of missed one)
All other AKM (riveted AK) use the same bolt and carrier pictured above.

They aren't quite stainless as they do stain and get mottled.

[valley82]

Stainless steel not sure what grade but it is stainless steel.

[safewaysecurity]

Does look a lot like my milled yugo. I'd like to see what Nico has to say.

[valley82]

Ok, you get three guesses which is the Yugo 1 1/2mm and which is the standard 1mm flat.

[Gowking]

Obviously the metal is thicker between the two which is why a proper 1.0mm receivers top rail has a step. The dimension goes back to the milled receivers and probably the original design.

[valley82]

The standard AKM is...1mm thick at the top rail...the Yugo is 1.5mm...
By the way both are AK builder...are they not proper???
I give...wake me when you guys figure out why the carrier doesn't fit.

[Gowking]

What don't you understand about what I typed? The top rail on a proper 1.0mm receiver has a step in it to make up the thickness to 1.5mm. I mean proper as in to original spec, not early AK-Builder flats and not a NDS-3 but current AK-Builder flats with the stepped top rail and the NDS premium receivers. Besides by your logic involving some imaginary OAL thickness difference between the two a Yugo carrier would fit a Romanian receiver but not the other way around which is clearly not the case.

[nicoroshi]

I will post here my thoughts on it that I PMed back to the OP.

NOT Yugo! I know my Yugos and that's certainly not Yugoslavian.
Serials are in the wrong location on both the bolt, and carrier to be Yugoslavian as well.
Also notice there is no auto sear trip bump on the bottom right of the carrier.
From the bolt face it was a double stack magazine rifle too.
That carrier came from an imported semi-auto only rifle that accepted double stack magazines.
So if it doesn't fit into a Romy. It's not Yugo. It's from an imported semi-auto only rifle, and the way the numbers are on the bolt, and carrier my best guess is it's from an imported sporterized Chinese rifle.
It is however only a guess.

EDIT: one other interesting thing of note.
The piston on the carrier lacks the gap it should have between the carrier, and piston to allow the piston to flex. Wonder if the piston was replaced (by someone who didn't know you're supposed to back them out a quarter turn)?

[nicoroshi]

Valley82 mad river arms is right on the money, My guess is chinese too. It appears polished as if whoever had it did not like the standard, more matte finish you see on Chinese. You can see the more matte finish especially on the underside where they didnt bother polishing.

Agreed.
Doesn't look like a factory finish.
Appears to have been done (polishing) by a previous owner.

[highpowermatch]

Hello All,

Now I feel like a moron , went to go take pictures of it "not fitting" into my receiver and found a burr obstructing the rail on the carrier. It wouldn't allow it to drop in and slide forward. Cleaned it up and it slid right in. Sorry to get this detailed discussion going on bad info. But thanks to you all for the detailed info and willingness to help! As usual Calgunners rock!

I will look closer next time before getting everyone on a roll here trying to solve a non existing issue

Will make a CGF donation today for my punishment

[JAGGUY]

I get from all this that the bolt and barrel came from different sources?
If so you need to check head spacing before you fire this...

[ott1]

Stainless steel not sure what grade but it is stainless steel.

It's not stainless. Go ahead and try to rust bluing on the carrier and see if it works. I'll bet that it does.