CMMG MK47 Mutant Thoughts?

[Mr. Glock]

I kind of dig the AR frame and 7.62x39 round/magazine hybrid that is the CMMG Mk47 Mutant. Although it is not cheap, it does solve a couple of ergonomic issues as well as is the 300 Blackout on the cheap (or is 300BLK an expensive 7.62x39 m43?).

What is the scoop on them? Anyone shoot one?

[CCIman]

I have a PWS- 7.62x39 upper that I can run any AR lower with ASC mags for 7.62x39.
So far no issues with that setup. Advabntage to the PWS is it uses a piston arm system modeled after the AK bolt, and the ergonomics of the AR for mag changes. MNitrided barrel. PWS is a high end brand to respect.
Downside is it uses a curved AR style mag, which may not feed as smoothly as a straight AR mag. ASC mags have worked well for me.

Advantage to the CMMG is it can use AK style mags- though that has drawbacks too. Downside is direct impingement on a 7.62x39 ammo (ie commie surplus dirty ammo)- are you kidding me?
http://www.americanrifleman.org/article ... ant-rifle/" onclick="window.open(this.href);return false;

For another consideration in hybrid- look from the other AK direction: M+M M10.

[CCIman]

If you want a lightweight, milled receiver, rifle that shoots 7.62x39 with a simple quality design package, look at the VZ58.

I have one and it is a very nice option for the 7.62x39.

[Morne]

Bolt thrust is bolt thrust. There's a reason the 7.62x39 isn't viewed all that favorably in the AR platform.

I say go .300 AAC BLK and just start reloading. It is the caliber that finally forced me into reloading.

[Mr. Glock]

Bolt thrust is bolt thrust. There's a reason the 7.62x39 isn't viewed all that favorably in the AR platform.

I say go .300 AAC BLK and just start reloading. It is the caliber that finally forced me into reloading.

CMMG hybridized the bolt too, in the AR-10 front/AR-15 rear fashion. On the surface, this should take care of the rim diameter issue and the recoil issue.

I've been dinkjng around with reloading, but available time is an issue. I'd end up buying a lot of 300 Blk ammo.....

[Mr. Glock]

If you want a lightweight, milled receiver, rifle that shoots 7.62x39 with a simple quality design package, look at the VZ58.

I have one and it is a very nice option for the 7.62x39.

I'm good on AKs, and the VZ is just too much in that family. Plus I'd have to stock on a new magazine type.

Good rifle though, and good suggestion beyond the standard AK.

[CCIman]

I read somewhere that this Mutant, or similar Rock-river using AK-style mags did well with the polymer mags, but not so well with the steel AK mags. Unfortunately don't remember which gun was being reviewed or where that article came from, likely Small Arms Review.

The AR 7.62x39 upper platform has been done for a while by many manufactures- only recently getting the AR lower to take the AK mag.

The bar has been set high the AK and the AR. Reliability will always be the question because of the variables: DI vs piston, bolt selection, firing pin modification, chamber throating, choice of buffer and spring, mag design.

You hope that the more expensive models/brands have ironed these out in the R&D. Let us know how the CMMG works out, hopefully it is boring.

[CCIman]

Bolt thrust is bolt thrust. There's a reason the 7.62x39 isn't viewed all that favorably in the AR platform.

I say go .300 AAC BLK and just start reloading. It is the caliber that finally forced me into reloading.

Interesting, I had not heard the terms "bolt thrust".
http://www.beyond556.com/bboard/forum/a ... thrust-faq" onclick="window.open(this.href);return false;

What abut the other larger caliber AR's: 308, or even the 50BMG?

[Morne]

Bolt thrust is bolt thrust. There's a reason the 7.62x39 isn't viewed all that favorably in the AR platform.

I say go .300 AAC BLK and just start reloading. It is the caliber that finally forced me into reloading.

Interesting, I had not heard the terms "bolt thrust".
http://www.beyond556.com/bboard/forum/a ... thrust-faq" onclick="window.open(this.href);return false;

What abut the other larger caliber AR's: 308, or even the 50BMG?

The .308 is out of the AR-10, not the AR-15. Different lower, different bolt, etc. Besides, the .308 doesn't have the same case taper that the 7.62x39mm does.

Interestingly, the .458 SOCOM uses a 7.62x39mm boltface and thus has some of the same problems in the AR-15 platform. Ditto the .50 Beowulf.

The advantage of the .300 AAC BLK and .277 Wolverine are that the only part needed to be changed out is the barrel. Bolt, mags, everything else is identical to the 5.56x45mm.

[Delta-3]

Go to youtube & check out the videos & reports there. Specifically from Mr guns and gear. He's done a couple of 1k+ rounds of "torture" testing (if you will). It seems to work very well with any AK mag. It uses a 308 bolt head so there is a lot of metal around the case head compared to other 7x39mm rifles.
I've been watching this rifle since it's introduction & it seems to be the best yet crossover AR to use AK mags.

[Mr. Glock]

About the only negative is the lack of a bolt hold-open and release, which they are working on according to a SHOT 2016 YouTube.

[jeep45238]

Bolt thrust is bolt thrust. There's a reason the 7.62x39 isn't viewed all that favorably in the AR platform.

I say go .300 AAC BLK and just start reloading. It is the caliber that finally forced me into reloading.

Interesting, I had not heard the terms "bolt thrust".
http://www.beyond556.com/bboard/forum/a ... thrust-faq" onclick="window.open(this.href);return false;

What abut the other larger caliber AR's: 308, or even the 50BMG?

The .308 is out of the AR-10, not the AR-15. Different lower, different bolt, etc. Besides, the .308 doesn't have the same case taper that the 7.62x39mm does.

Interestingly, the .458 SOCOM uses a 7.62x39mm boltface and thus has some of the same problems in the AR-15 platform. Ditto the .50 Beowulf.

The advantage of the .300 AAC BLK and .277 Wolverine are that the only part needed to be changed out is the barrel. Bolt, mags, everything else is identical to the 5.56x45mm.

Hence mutant. This thing runs n AR10 sized bolt carrier on AR15 ergonomics and gas system with AK rounds.

It's interesting to say the least, but I'd be more interested in Sig solving their rifle issues and running their 7.62 option.