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7.62x39 AR Platform


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16 replies to this topic

#1 DannyP

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Posted 14 January 2012 - 08:15 AM

Hey guys, i'm thinking about getting a AR in 7.62x39. I was looking at Bushmaster and Dstars but talked to some guys about doing different uppers. My question is, what would work best? Any input is appreciated

Danny

#2 k9wh91984

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Posted 14 January 2012 - 08:55 AM

From what I heard the AR platform with a 7.62x39 round has alot of reliability issues. Stick with an AK and you'll be gtg! ;)

#3 R1100R

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Posted 14 January 2012 - 11:22 AM

I have also been interested in a 7.62X39 build. Most of this has seemed to be plagued by magazine issues. My understanding is ASC magazines have solve this issue. In the beginning it was the bolt which was resolved sometime back. Armalite, Yankee Hill and Olympic and BCM are or have offered rifles or uppers in this round. Bushmaster, DPMS have for a long time. My issue is the price. There are some getting into the 7.62X51 realm of pricing.

I still wanting to do one, just waiting on a good deal on a upper. It is on the back burner due to other projects. BTW I have a few AK's already and a AR15 in 5.45X39 Russian.

If you want to do some reading go to M4Carbine.net. AR15.com has a lot on it if you can sift through the BS.

Edited by R1100R, 14 January 2012 - 11:24 AM.


#4 TNWNGR

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Posted 14 January 2012 - 12:00 PM

I have a Colt Sporter in 7.62x39 which is a pretty nice set up with magazines being the only weak link. It is one of those rifle's you want to own until you purchase one and find out it's quirks.

#5 alleycat72

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Posted 15 January 2012 - 11:22 PM

300 Blackout

#6 bkelm18

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Posted 15 January 2012 - 11:26 PM

300 Blackout


Yes... $0.18 per round (7.62x39) versus $1 per round (Blackout). :) If you're not a reloader you better be rich.

Edited by bkelm18, 16 January 2012 - 12:19 AM.


#7 Lumber_Jack

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Posted 15 January 2012 - 11:52 PM

NM

Edited by Lumber_Jack, 15 January 2012 - 11:58 PM.


#8 LA_357SIG

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Posted 16 January 2012 - 12:52 AM

For the life of me, I can't figure out why so much bad information is still taken as law on the internet about 7.62x39 AR-15's. It is like the platform never evolved past Colt and Frankenmags back in the 90's.

Anyway, I built a 7.62x39mm piston AR from the cheapest parts I could find and it runs 100% suppressed, with Wolf, Brown/Silver Bear and Yugo surplus. All parts use were standard AR parts except the piston, bolt carrier, enhanced firing pin and 7.62x39 bolt. The only mod neccessary is filing deeper than standard receiver feedramp cuts.
Posted Image
ASC and C-products make magazines now and can be made reliable.
http://www.youtube.com/watch?v=5HMYdNBkAUY
http://www.youtube.com/watch?v=2FntJSnPo_c

And don't get me started on the other site mentioned above. Those guys keep regurgitating last decades problems with the 7.62x39 AR problems despite members with WORKING AR's proving otherwise. The level of ignorance and mis-information that gets touted over there really ticks me off.

Edited by LA_357SIG, 16 January 2012 - 12:56 AM.


#9 Caster

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Posted 16 January 2012 - 02:53 AM

Even if they function flawlessly, that godawful elephant tusk for a magazine ruins the look of an otherwise nice looking rifle. At least it do for me, yuck.;)

#10 XxthejuicexX

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Posted 16 January 2012 - 02:58 AM

LA did you do the feed ramp work or have someone else do it? I have an AR

#11 XxthejuicexX

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Posted 16 January 2012 - 03:00 AM

..... In 7.62x39 and every now and again I have feeding issues the round will jamb into the feed ramp. I thought to problem was the C products mag but after reading your comment about the feed ramp I bet thats my issue. I have a J&T / Doublestar.

#12 R1100R

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Posted 16 January 2012 - 05:44 AM

If you ever seen a Bushmaster Feed Ramp for a 7.62X39 upper it is huge. The whole bottom ramp is just one machined big ramp.



Posted Image

Edited by R1100R, 16 January 2012 - 05:48 AM.


#13 LA_357SIG

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Posted 16 January 2012 - 06:01 AM

LA did you do the feed ramp work or have someone else do it? I have an AR


Although I hate to admit it, I did it with a round file, didn't clean it up at all, test shot it, forgot to clean it up (smooth and polished), kept shooting and over a year and 4,000 rounds later, I haven't had any failures to feed.


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#14 LA_357SIG

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Posted 16 January 2012 - 06:03 AM

..... In 7.62x39 and every now and again I have feeding issues the round will jamb into the feed ramp. I thought to problem was the C products mag but after reading your comment about the feed ramp I bet thats my issue. I have a J&T / Doublestar.


If you have 30 round C-Products or ASC magazines, take the spring out and make sure the front of the follower is tilted up. Both companies send out more improperly installed springs than the right way.

#15 XxthejuicexX

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Posted 17 January 2012 - 02:48 AM

Posted Image

#16 XxthejuicexX

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Posted 17 January 2012 - 02:51 AM

thats my feed ramp. It's kind of hard to see but at the bottoms of the ramps there are little dings from where rounds have jammed. And yes I know it's dirty at the moment :D So do you guys think maybe it's the magazine and not my rifle?

#17 blahX3

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Posted 18 January 2012 - 01:21 AM

What about Sig 556R? They take AK mags