Threads on AP 80

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Rumnhammer
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Threads on AP 80

Post by Rumnhammer » Sat Jan 28, 2012 10:28 am

Hi all, had a quick question. I have a Jager AP 80 (AK 22) and removed the barrel's thread protector for the first time yesterday. I'm considering suppressing it. I was wondering what the threads are on it, I was hoping they would be 1/2 x28 but I believe they are metric since the rifle was made in italy.

I had one person tell me they could be M12x 1.25 and after trying the thread protector with a tap that size, it threaded right on, however trying a die that size didn't want to start on the threads and I stopped because I didn't want to mess the barrel threading up. Since the protector threaded right on to the tap, is it a safe bet that is the correct threading?

Also if it is M12x 1.25 is that a common suppressor thread? if not could I get an adapter so I would be able to use a can with 1/2 x28 threads?

Chris Rummel

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Kevin/AAC
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Re: Threads on AP 80

Post by Kevin/AAC » Sat Jan 28, 2012 10:43 am

1/2-20tpi
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Rumnhammer
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Re: Threads on AP 80

Post by Rumnhammer » Sat Jan 28, 2012 11:36 am

Kevin thanks for replying, are you sure that is the thread for that rifle? and do they make adapters to use a can with 1/2x 28 threads?

Chris

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Enfield577
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Re: Threads on AP 80

Post by Enfield577 » Sat Jan 28, 2012 2:27 pm

As it is a European firearm I very much doubt that it would have an imperial thread on it (unless done in the US)

It would most likely be metric

I would drop into a local engineering shop they should be able to properly measure it for you (and likely make an adaptor)

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Rumnhammer
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Re: Threads on AP 80

Post by Rumnhammer » Sat Jan 28, 2012 3:10 pm

I measured the outside diameter of the threads and it was .49 or 12mm. I was just wondering if Kevin got the thread from a source that listed the AP 80.

Chris

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Re: Threads on AP 80

Post by Rumnhammer » Tue Feb 07, 2012 6:15 pm

got a 1/2x 20 nut today to try out the fit. Went right on. perfect thanks Kevin. Really wanted it to be 1/2x28 but at least this is a common thread.

Chris Rummel

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