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Posted: 7/21/2017 11:33:08 PM EDT
I've got a Zenith full size SBR, and recently picked up a German fixed stock from 1975.

It appears not to have a buffer as we know them now, just this plastic thing that is riveted to a metal plate.  Is this normal, or did I buy an incomplete stock.  Just shoot it and don't worry?
Link Posted: 7/22/2017 12:25:41 AM EDT
[#1]
Not sure what the plastic thing you're talking about is, but there's no buffer in MP5A2 stocks so you should be good to go.
Link Posted: 7/22/2017 12:30:49 AM EDT
[#2]
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Quoted:
Not sure what the plastic thing you're talking about is, but there's no buffer in MP5A2 stocks so you should be good to go.
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Wish I had a pic.

It's a hard black plastic plate where I'd have expected a urethane or rubber (given '75) buffer. It is riveted to a stamped steel backing using 2 rivets.  The plastic does exhibit some degree of bolt impact damage.
Link Posted: 7/22/2017 1:35:30 AM EDT
[#3]
It sounds like you have an HK-93/HK-33 (5.56mm) stock. The MP-5 "A2" fixed stock doesn't have the plastic disc, it only has a metal plate with no buffer. As far as I know, the 5.56mm stocks work just fine on the 9mm guns, but not the other way around.
Link Posted: 7/22/2017 2:19:41 AM EDT
[#4]
Yeah it does sound like an HK33 stock. Another way to tell is the curved buttplate. MP5 buttplates are flat.
Link Posted: 7/22/2017 10:23:39 PM EDT
[#5]
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Quoted:
It sounds like you have an HK-93/HK-33 (5.56mm) stock. The MP-5 "A2" fixed stock doesn't have the plastic disc, it only has a metal plate with no buffer. As far as I know, the 5.56mm stocks work just fine on the 9mm guns, but not the other way around.
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Doah! 

I'm not home now, but I believe it's curved.  Drat!
Link Posted: 7/24/2017 8:08:14 PM EDT
[#6]
It is straight! But it has the disk.

The disk is dated with an verbatim date of 5/1/75. The body has a code of 3HJ. Could ones of.this age have the disk? Added later perhaps?

What harm could the disk cause? (As mentioned above)
Link Posted: 7/24/2017 8:13:57 PM EDT
[#7]
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Quoted:
It is straight! But it has the disk.

The disk is dated with an verbatim date of 5/1/75. The body has a code of 3HJ. Could ones of.this age have the disk? Added later perhaps?

What harm could the disk cause? (As mentioned above)
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I have a fixed stock that like yours has a round buffer or plate that is held in with 2 rivets. It is dated from the 1970s as well. Sounds correct to me - just old.
Link Posted: 7/24/2017 9:16:54 PM EDT
[#8]
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Quoted:


I have a fixed stock that like yours has a round buffer or plate that is held in with 2 rivets. It is dated from the 1970s as well. Sounds correct to me - just old.
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Excellent, thanks!
Link Posted: 7/24/2017 10:46:22 PM EDT
[#9]
You guys made me get out my Mp5 stock. It has a 3IJ code but no numerical date anywhere on it.
Link Posted: 7/25/2017 7:51:05 AM EDT
[#10]
I've run the exact same stock on my MP5 SBR for years with no issues. You even shot it up at Hite Hollow back in the day.
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