Flash hider: German v. Yugo

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Abominog
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Flash hider: German v. Yugo

Post by Abominog » Tue Apr 16, 2019 10:19 am

Conventional wisdom right now is that FH with thin rings are German, and those with fat rings are Yugo.

I found one old thread that agreed with this, though note that "anything BK was made by Yugos" is now known to be untrue, since the Yugos restamped German parts. http://mg42.us/viewtopic.php?f=9&t=1250 ... ngs#p90176

I'm having trouble buying into this "thin ring German, fat Yugo". I have too many FH from too many non-Yugo sources that are fat ring.

What I don't have (or, more correctly, haven't had time to confirm) is a fat ring FH that's German marked. That would be the proof.

Anyone?
FNG

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Chuck42
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Re: Flash hider: German v. Yugo

Post by Chuck42 » Wed May 01, 2019 12:41 am

Generally yugos have a very course knurling. Late ww2 mg42 have fatter rings usually the last ring near the end of the barrel is the fattest on late ww2 stuff. Also visually the smaller part of the cone on a yugo looks smaller around than a german but the inside of the yugo booster is larger allowing more air to escape also slowing the rate of fire. This means if you have a semi auto German 42 and you are overpowering your semi bolt it might help to use a yugo booster cone. At least at the range not to look at of course..lol jk

And yes many ww2 parts were inspected by sarac and stamped. I have a few demilled rear receivers late ww2 that have a few yugo inspection marks.

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Re: Flash hider: German v. Yugo

Post by Chuck42 » Sun May 19, 2019 3:14 pm

Some ww2 cones, one has pretty fat ribs with fine knurling probably late war. both marked pj also another one with the fat last ring late war. Also added a picture of a yugo cone with some of the differences I notice.
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Chuck42
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Re: Flash hider: German v. Yugo

Post by Chuck42 » Thu May 14, 2020 12:05 am

Chuck42 wrote:
Sun May 19, 2019 3:14 pm
Some ww2 cones, one has pretty fat ribs with fine knurling probably late war. both marked pj also another one with the fat last ring late war. Also added a picture of a yugo cone with some of the differences I notice.
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Re: Flash hider: German v. Yugo

Post by joe6167 » Sun May 17, 2020 7:01 am

Also keep in mind that the Yugo Flash Hiders will probably also have the part number stamped on it, which is S112-19152 and you will likely find Yugo proof marks as well.
IMG_2250.JPG
I broke out the calipers and measured the grooves between the knurles. They are about .170" (11/64) wide.

The smallest diameter of the taper (just ahead of the fillet) is .875" (7/8)

The vent hole diameter is a bout .312" (5/16)

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Re: Flash hider: German v. Yugo

Post by Chuck42 » Mon May 18, 2020 11:29 pm

Right, and checking the narrowest part of the taper on 3 different WW2 cones gave me .935 .944 .950. So ww2 is roughly 1/16+ larger than yugo in the small of the cone. The part number is a good dead giveaway but not all yugo's have it on the cone most do, whether some just didn't come with it or they had been scrubbed,( which I've seen) same with the front sight and stock some have the serial # some don't I have noticed.

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