AR-15 build with 7.62x39
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AR-15 build with 7.62x39


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Old 01-28-2012, 07:25 AM   #1
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Default AR-15 build with 7.62x39

Hey guys, I was curious if anyone knew some things I wanted to ask about this AR build. I'm going to number them so you can refer to them easier and type less.


1. Will a standard lower for a 5.56 AR accept mag that hold 7.62x39 (not AK mags, AR mags in 7.62x39, that I know exist)?

2. Is there a way that I can build one with a gas piston system in 7.62x39?

3. If I built a 7.62x39 gas piston AR, is there anything else I should consider when building one?


Now, I know that some of you may consider this a terrible idea, and I understand your considerations. I find the 7.62x39 superior for what I would want it for, and it doesn't matter to me otherwise.

I like the AR platform, but I want that round with a reliable gas system.

Any other helpful websites with good parts and links to sites would help me greatly as well.

Thanks all! ^_^
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Old 01-28-2012, 11:58 AM   #2
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Originally Posted by GregTheHun View Post
1. Will a standard lower for a 5.56 AR accept mag that hold 7.62x39 (not AK mags, AR mags in 7.62x39, that I know exist)?

2. Is there a way that I can build one with a gas piston system in 7.62x39?

3. If I built a 7.62x39 gas piston AR, is there anything else I should consider when building one?
1. Yes a milspec AR15 lower will accept AR15 magazines made for the 7.62x39

2. If the diameter of barrel at the gas port (0.75" is standard) is the same diameter as the pistons gas block, then yes you can install a piston system. Finding a good barrel is the tricky part of this build.

3. There is a variety of opinion on the combination of AR15 & 7.62 x 39, some say they are great. Others say not so much. Main issues referenced are magazine availability/quality and difficulty feeding ammuntion. Scroll through the AR 15 section on the forum, there are several threads on this subject.

I still want one, just have not pulled the trigger so to speak.

Armalite has introduced a 7.62 x 39 upper, that may be worth checking out.

Don't be afraid of direct impingement, it is a reliable system.
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Old 01-28-2012, 01:39 PM   #3
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Gatoragn pretty much nailed it above. From what I've read of others trying this, usually buying a complete DI upper, the biggest challenge is finding magazines that will feed 7.62x39 reliably in the AR magwell. I don't remember a piston build but suppose it would work as long as the gas impulse can be adjusted properly.
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Old 01-29-2012, 05:18 AM   #4
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The only thing that I'm not a fan of in the DI system, is that the gun has to kept a wet gun. It's not that I won't take care of it, but none-the-less...

One more trick, can you make it lefty, with controls and round ejection?

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Old 01-29-2012, 10:43 AM   #5
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The only thing that I'm not a fan of in the DI system, is that the gun has to kept a wet gun. It's not that I won't take care of it, but none-the-less...

One more trick, can you make it lefty, with controls and round ejection?
I am not an expert, but I own a piston 5.56 AR and I apply the same amount of oil on it as I do on my DI upper. Also have a blow-back AR copy in .45 acp that works best when well oiled. I believe it is just the nature of the beast.

Midway USA sells a left handed stripped upper. Lots of ambidextrous controls on the market today.
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Old 01-29-2012, 02:56 PM   #6
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Oh, I know you can make it left handed, but do you have the option of makin it 7.62x39 with a gas piston and left-handed?
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Old 01-29-2012, 02:59 PM   #7
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What are you wanting the x39 round for and what will it do in an AR that it won't do for you in an AK?
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"The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together."
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Old 01-29-2012, 03:08 PM   #8
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Oh, I know you can make it left handed, but do you have the option of makin it 7.62x39 with a gas piston and left-handed?
Installing a barrel and piston system on an upper is the same process, whether it is left or right hand oriented.
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Old 01-29-2012, 03:23 PM   #9
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Well, there's two things that I like about the 7.62x39 round mjkeat.

One, it's ability to punch through some heavy duty stuff at close range... Which isn't so important now as when **** hits the fan.

Two, price, cause its dirt cheap.

I like the AR's versatility in the fact that it can have a lot of accessories and parts changes to allow different cartridges.

Plus, parts are always easy to replace.

And an AK is just an ugly gun.



And Gatoragn, the caliber doesn't matter with left or right handed operation, I've heard some people talking about how you can either get a right handed gas piston gun in that caliber in gas, or left handed with DI and that caliber.

But not both.
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Old 01-29-2012, 03:30 PM   #10
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... And an AK is just an ugly gun...
Hey everybody's got an ugly duckling or two!

I love my ARs but have to say for the Soviet rounds the AK is the way to go as there's no doubt that it works. I hope you can find what you want in an AR but with all those parameters you're beating your own trail.
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