Who makes a 7.62x39 based on a AR-15 Frame?


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ShootStraight
November 4, 2008, 06:15 PM
Which firearm manufacturers make the 7.62x39 based on a AR-15 frame? I know Sabre firearms makes a few firearms like this, but I believe there are some others. What are the pros and cons of using the 7.62x39 based on a AR-15 frame? I know the the 7.62 is more powerful than the .223. The recoil is a bit more, but the wound channel would likely be bigger coming from this caliber. Are there other opinions?

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Dr. Tad Hussein Winslow
November 4, 2008, 06:17 PM
Several companies have in the past and/or do still make uppers, including Colt.

Pros: Ergos of an AR with the added power of the 7.62x39mm

Cons: Must have proper mags, and they're not very common.

everallm
November 4, 2008, 06:34 PM
Robinson Arms makes the XCR in 5.56, 7.62x39 and 6.8SPC

C-Products make a reported reliable 7.62x39 AR magwell magazine.

Pretty picture from the latest issue of Guns and Weapons (Law Enforcement)

http://www.tactical-life.com/online/wp-content/uploads/2008/10/robinson.gif

Write up link attached if you're interested, quite long so I didn't paste all of it.

http://www.tactical-life.com/online/guns-and-weapons/robinson-arms-exchangable-calibur-rifle/

Evil Monkey
November 4, 2008, 06:41 PM
C-Products make a reported reliable 7.62x39 AR magwell magazine.

Not from what I'm reading on arfcom.

MGshaggy
November 4, 2008, 07:27 PM
A few other points to consider...

1) Because of the additional stress on the bolt by the more powerful cartridge, 7.62x39 ARs tend to eat bolts faster. And the shorter the barrel, the more parts breakage you're likely to experience. If you get an SBR below 16", you better keep a few spare bolts on hand whenever you shoot. If you get a 20" you can probably go much longer without breakage.

2) AFAIK there are no chrome lined 7.62x39 AR15/M16 barrels - stainless or chrome-moly. If you use corrosive ammo, you can ruin the upper quickly if you don't clean properly (and quickly) after each outing.

3)Parts availability - as you probably know there are far fewer places to get 7.62x39 AR15 parts. That may not be a big deal to you now, but when/if you break something it could become a huge issue. For this reason I like to keep 7.62x39 in my AKs - parts are relatively cheap and plentiful compared to 7.62x39 AR parts.

camper
November 4, 2008, 07:37 PM
I had one made at: Del-Ton.com. Use CProduct mags, 7.62x39, with it and added an MGI bolt and firing pin. Works great!

tacweapon
November 4, 2008, 07:44 PM
I would suggest the XCR

With the 3-Lug Bolt I dont think you will have to worry about that massive thing breaking

I have heard the C-Products Mags are getting better but to be honest I have to ordered the 7.62x39 kit yet because of the mags

wacki
November 4, 2008, 08:10 PM
3-Lug Bolt

???? what is 4-Lug

rbernie
November 4, 2008, 08:17 PM
I have Model1Sales and DelTon uppers in 7.62x39 and both work fine. I use the latest/last iteration of C Products 30rd mags and they are working out well for me (for my casual range use). I have also used MGW 10rd mags with these uppers with 100% success.

Because of the additional stress on the bolt by the more powerful cartridge, 7.62x39 ARs tend to eat bolts faster.I'd like to see evidence of this. I have many thousands of rounds downrange in both 'traditional' as well as 'non-traditional' AR chamberings such as 7.62x39, and have observed no such correlation.

The 7.62x39 round uses a heavier bullet, but has no more case volume and operates at a lower pressure than does 5.56NATO.

Parts availability - as you probably know there are far fewer places to get 7.62x39 AR15 parts. The only parts that are unique to a 7.62x39 AR (other than the barrel and magazine) is the stripped bolt and the extractor. That's not a lot of parts to keep up with.

mordechaianiliewicz
November 4, 2008, 09:14 PM
Oly Arms did. Don't know if they still do though

everallm
November 4, 2008, 09:15 PM
Wacki,

If you look at the face of the AR-15 bolt it looks like a daisy head with 7 slender lugs.

The XCR has only 3 large lugs.

Below is an image of a bolt from the left to right an XCR, AK, AR-10, AA Grendel, AR-15, Kel Tec PLR

http://www.65grendel.com/forum/attachment.php?attachmentid=723&stc=1

The XCR barrel is chrome lined so potential corrosion is managed.

JTW Jr.
November 4, 2008, 10:05 PM
check out the MGI's:
http://www.mgimilitary.com/Lower_Receiver_Mult_Mag_Wells.htm

get a lower that doesnt use a frankenmag setup.

NELSONs02
November 4, 2008, 10:30 PM
dpms makes a 16" and 20" ar15. Not base on but is an AR

Robusto
November 4, 2008, 10:35 PM
Because of the additional stress on the bolt by the more powerful cartridge, 7.62x39 ARs tend to eat bolts faster.

FALSE!!! The 6.5 Grendel runs higher pressure and has no problems. A properly treated bolt will outlast your barrel.

Forget the bolt, the real problem is with the cartridge taper. AR mags are not curved enough to reliably feed 7.62 cases.

rbernie
November 4, 2008, 10:49 PM
AR mags are not curved enough to reliably feed 7.62 cases.True, until now. The C-Products mags are now curved heavily below the magwell and the follower is allowed to tilt to compensate for the case taper. They now resemble pre-formed Frankenmags.

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