Suppressing a PTR91 or HK G3 clone

[ARCHIVED THREAD] - Suppressing a PTR91 or HK G3 clone

Posted: 5/10/2018 7:27:41 PM EDT

I have seen a few things on the internet that tell me the G3 design doesn't like to run suppressed.

I have a PTR91 and I have an AAC SDN6. I'd like to get an appropriate muzzle attachment and suppress it. What more do I need?

Has anyone thrown a suppressor on their G3 clone? Experiences?

Posted: 5/10/2018 7:29:03 PM EDT

[#1]

I'm curious as well

Attached File

Posted: 5/10/2018 7:30:44 PM EDT

[#2]

In before the welds on the buttstock break..

too much bolt velocity with the stock locking block..

You will need to swap to a 17 locking block and retime with new rollers.

Posted: 5/10/2018 7:31:09 PM EDT

[#3]

I hope your PTR is late production, the early ones had that bastard HK thread.

Posted: 5/10/2018 7:32:07 PM EDT

[#4]

Tag, I'll eventually be sbring and suppressing my 12" g3 clone.

Posted: 5/10/2018 7:36:16 PM EDT

[#5]

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Quoted:
Tag, I'll eventually be sbring and suppressing my 12" g3 clone.

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at that length the stock block will work.

Posted: 5/10/2018 7:37:20 PM EDT

[#6]

I think that @Undefined has one on his, or at least he used to.

Posted: 5/10/2018 7:37:37 PM EDT

[#7]

Quote History

Quoted:

at that length the stock block will work.

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Good to know, thank you!

Posted: 5/10/2018 7:41:41 PM EDT

[#8]

Ok ill explain it, the suppressor adds to the length of the barrel. the system is timed to open at the stock length. when you add another 10+ inches to the barrel it wont have time to bleed off the excess pressure. so when the bolt opens its over gassed/more pressure than stock. which will batter the back of the stock breaking the tack welds on the cap.

So to make it work right you need a more sloped Locking Block the #17 is slower and compensates for the excess pressure. I run mine this way. Works great and dosnt fling the brass 100 yards down range.

Posted: 5/10/2018 7:42:26 PM EDT

[#9]

Quote History

Quoted:
In before the welds on the buttstock break..

too much bolt velocity with the stock locking block..

You will need to swap to a 17 locking block and retime with new rollers.

View Quote

I already have a #17 block and bolt gap is GTG. Am I suppressor ready?

Posted: 5/10/2018 7:43:25 PM EDT

[#10]

Quote History

Quoted:

I already have a #17 block and bolt gap is GTG. Am I suppressor ready?

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Yup! you are good to go!

Posted: 5/10/2018 7:45:07 PM EDT

[#11]

Quote History

Quoted:
Ok ill explain it, the suppressor adds to the length of the barrel. the system is timed to open at the stock length. when you add another 10+ inches to the barrel it wont have time to bleed off the excess pressure. so when the bolt opens its over gassed/more pressure than stock. which will batter the back of the stock breaking the tack welds on the cap.

So to make it work right you need a more sloped Locking Block the #17 is slower and compensates for the excess pressure. I run mine this way. Works great and dosnt fling the brass 100 yards down range.

View Quote

I would have never thought of any of that. You are the man.

Posted: 5/10/2018 7:53:30 PM EDT

[#12]

Quote History

Quoted:
Tag, I'll eventually be sbring and suppressing my 12" g3 clone.

View Quote

Posted: 5/10/2018 7:54:00 PM EDT

[#13]

Mine definatley recoils too violentley with the suppresser to be good on it. I need to upgrade to a #17 on mine but dont use it very much at all anymore. I ised it with a 762sd and a saker.

Posted: 5/10/2018 7:58:29 PM EDT

[#14]

What site sells the #17 that I need?

I don't own any other 308 rifles, so I ought put a little cash to convert this one to suppressed as minimal investment.

https://www.brownells.com/rifle-parts/bolt-parts/breech-bolts-blocks/g3-hk91-locking-piece-7-62-17-36-degree-prod104877.aspx

That's all?

Posted: 5/10/2018 8:00:43 PM EDT

[#15]

I run a #17 locking piece, works great suppressed.

Posted: 5/10/2018 8:01:38 PM EDT

[#16]

Quote History

Quoted:
What site sells the #17 that I need?

I don't own any other 308 rifles, so I ought put a little cash to convert this one to suppressed as minimal investment.

https://www.brownells.com/rifle-parts/bolt-parts/breech-bolts-blocks/g3-hk91-locking-piece-7-62-17-36-degree-prod104877.aspx

That's all?

View Quote

That's the same one I run.

Posted: 5/10/2018 8:08:28 PM EDT

[#17]

Quote History

Quoted:

That's the same one I run.

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Looks like I'm all out of excuses. Anyone know thread turn or appropriate mount from AAC I need as well?

Posted: 5/10/2018 8:37:19 PM EDT

[#18]

You can also upgrade to the heavy buffer.

Posted: 5/10/2018 8:44:27 PM EDT

[#19]

Quote History

Quoted:
What site sells the #17 that I need?

I don't own any other 308 rifles, so I ought put a little cash to convert this one to suppressed as minimal investment.

https://www.brownells.com/rifle-parts/bolt-parts/breech-bolts-blocks/g3-hk91-locking-piece-7-62-17-36-degree-prod104877.aspx

That's all?

View Quote

This one is more expensive, but real German.

https://www.hkparts.net/shop/pc/HK-German-17-Locking-Piece-36-Degree-113p581.htm

Posted: 5/10/2018 8:48:12 PM EDT

[#20]

$20 less than HK Parts, and RTG is a good company, in my experience.

Posted: 5/10/2018 8:51:30 PM EDT

[#21]

Quote History

Quoted:

This one is more expensive, but real German.

https://www.hkparts.net/shop/pc/HK-German-17-Locking-Piece-36-Degree-113p581.htm

View Quote

Learn something new everyday. I have a Hk91, what's the factory original locking piece in terms of # and degree? Would a regular semi unsupressed 91 benefit from the #17 locking piece in any way?

Posted: 5/10/2018 8:55:54 PM EDT

[#22]

How do they run w/out the supressor on though w/ the #17 locking piece?

Posted: 5/10/2018 9:01:03 PM EDT

[#23]

Quote History

Quoted:
How do they run w/out the supressor on though w/ the #17 locking piece?

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Just fine. Softer shooting with the #17.

Posted: 5/10/2018 9:31:17 PM EDT

[#24]

Used German #17 locking piece

http://www.gatewoodsupplyco.com/German-HK-21-G3-17-Locking-Piece--Used_p_1249.html

Posted: 5/10/2018 9:36:08 PM EDT

[#25]

I got my #17 locking piece from RTG Parts.

Posted: 5/10/2018 9:38:30 PM EDT

[#26]

Quote History

Quoted:
Learn something new everyday. I have a Hk91, what's the factory original locking piece in terms of # and degree? Would a regular semi unsupressed 91 benefit from the #17 locking piece in any way?

View Quote View All Quotes

View All Quotes

Quote History

Quoted:

Quoted:

This one is more expensive, but real German.

https://www.hkparts.net/shop/pc/HK-German-17-Locking-Piece-36-Degree-113p581.htm

Learn something new everyday. I have a Hk91, what's the factory original locking piece in terms of # and degree? Would a regular semi unsupressed 91 benefit from the #17 locking piece in any way?

Dunno.

I've got a CETME.

The WEEK after I bought my CETME, I found a nice HK91 at a gun show for $750.

FUCK.

Posted: 5/10/2018 9:40:50 PM EDT

[#27]

Quote History

Quoted:

Dunno.

I've got a CETME.

The WEEK after I bought my CETME, I found a nice HK91 at a gun show for $750.

FUCK.

View Quote

Please tell me you bought the 91 and sold off the cetme and lived happily ever after.
im on my second Hk91. This one isn't getting away. Made that mistake once, not again.

Posted: 5/10/2018 9:41:15 PM EDT

[#28]

I'm poor, will the German #17 bolt work on my CETME?

Posted: 5/10/2018 10:05:48 PM EDT

[#29]

Quote History

Quoted:
I'm poor, will the German #17 bolt work on my CETME?

View Quote

It's a locking piece, not a bolt....

Posted: 5/10/2018 10:06:44 PM EDT

[#30]

Remember, after changing out the locking block the bolt gap MIGHT be different. So please double check it..

yes you can fire it that way unsuppressed, its much softer in recoil and doesn't batter the cases to shit. And yes it should work in the cetme as well..

Posted: 5/13/2018 8:27:22 AM EDT

[#31]

That wood you have on your PTR Rifle looks great ! To bad there is not a better supply of the wood stocks sets on the US market. We have been looking in Germany but only able to find a small number of incomplete sets.

[ARCHIVED THREAD] - Suppressing a PTR91 or HK G3 clone

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