Rock River Arms LAR-47, and Sig 556R Thoughts

[Wild Geese 1]

I have been waiting for the release of the LAR-47 just to have an AR in 7.62X39 that takes AK Magazines. But it would also seem that with a good 6.5 Grendel upper, it would make a good combo rifle. The AK Magazines seem like they would feed the 6.5,
possibly better than some if not all of the present AR magazines that are available.

Along the same line of thought, how about converting a Sig 556R to 6.5 Grendel, that could be done with a barrel change, and possibly a bolt.

What are your thoughts!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Schwag173]

I have my doubts that an AK magazine would be better, though I'll be interested to hear any testing of this. 7.62x39 casings are quite tapered, necessitating the distinct curved magazine. Grendel casings are not as tapered so the curve might actually cause problems.

[bwaites]

People have tried AK mags, don't work with the Grendel, too much curvature, as Schwag notes.

[Wild Geese 1]

[QUOTEbites;45836]People have tried AK mags, don't work with the Grendel, too much curvature, as Swag notes.[/QUOTE]

I have my doubts that an AK magazine would be better, though I'll be interested to hear any testing of this. 7.62x39 casings are quite tapered, necessitating the distinct curved magazine. Grendel casings are not as tapered so the curve might actually cause problems.

Thank you both for your information, one of the reasons that I thought the AK magazines might work is the 6.5 Grendel see to fit the magazines correctly ( of course I have never tried to actually to feed them into any rifle, and the other is I read in one discussion about Wolf making the steel ammo, that the representatives from Wolf had put forward the possibilities of even making, or converting AK's to the 6.5 Grendel. Does anyone have a link to the information that the AK magazines do not work with the Grendel, I would like to read what the person or person's wrote.

[rasp65]

Fist of all you can't get an AK mag into an AR magwell. Take 10 or 15 Grendel cases laying on their side shoulder to shoulder rim to rim so you can see the curvature it makes notice how much less it is than an AK mag. For the mags to function correctly the cases have to be in good contact with each other. Too much curvature they touch at the shoulder too little they touch at the rim.

[mongoosesnipe]

the 556R has a tight chamber for 7.62x39 from what i have heard it does not like the steel 7.62x39 cases very much which kind of defeats the point of getting it over an ak in my opinion if i was going to go ak style i would probably pick up an arsenal ak but i have a 1954 russian sks that i like quite a bit and it pretty well covers my 7.62x39 itch

[carbontetrachloride]

The first 556Rs had problems long since cleared up. I'd take a current 556R over a RRA anything. The SIG is a much improved version of the AK rotating bolt system. Much better trigger and an optics rail right on top. I wish SIG would offer a 550 platform with a 20" barrel in 6.5 Grendel. Keep the Swiss style mag release and utilize a magazine curve that is optimum for the Grendel cartridge. Something like that would be hard to beat.

[Wild Geese 1]

Fist of all you can't get an AK mag into an AR magwell. Take 10 or 15 Grendel cases laying on their side shoulder to shoulder rim to rim so you can see the curvature it makes notice how much less it is than an AK mag. For the mags to function correctly the cases have to be in good contact with each other. Too much curvature they touch at the shoulder too little they touch at the rim.

The Rock River Arms LAR-47 lower receiver is designed to use AK magazines, it is not a standard AR lower receiver.

[Wild Geese 1]

the 556R has a tight chamber for 7.62x39 from what i have heard it does not like the steel 7.62x39 cases very much which kind of defeats the point of getting it over an ak in my opinion if i was going to go ak style i would probably pick up an arsenal ak but i have a 1954 russian sks that i like quite a bit and it pretty well covers my 7.62x39 itch

I have a Sig Sauer 556R, which was made in July 2012, and have over 1,500 rounds through it with Brown Bear, Silver Bear, Wolf Russian Steel Ammunition. I have also fired 280 rounds of Brass 7.62X39 Ammunition, all with ( NO ) malfunctions.

[mongoosesnipe]

The first 556Rs had problems long since cleared up. I'd take a current 556R over a RRA anything. The SIG is a much improved version of the AK rotating bolt system. Much better trigger and an optics rail right on top. I wish SIG would offer a 550 platform with a 20" barrel in 6.5 Grendel. Keep the Swiss style mag release and utilize a magazine curve that is optimum for the Grendel cartridge. Something like that would be hard to beat.

I have a Sig Sauer 556R, which was made in July 2012, and have over 1,500 rounds through it with Brown Bear, Silver Bear, Wolf Russian Steel Ammunition. I have also fired 280 rounds of Brass 7.72X39 Ammunition, all with ( NO ) malfunctions.

I stand corrected I heard a lot of stuff about them having issues with steel case when the first came out over on the sig556 site I have a 556 classic swat and love it it is an excellent platform in my opinion it's the optimal blend of ak reliability and ar ergonomics but you need big hands as the reach for the mag release is farther than an ar I probably would have gotten the Swiss style ak like mag release but the mags cost a lot more than I like compared to ar mags

[feetpiece]

I have a Sig Sauer 556R, which was made in July 2012, and have over 1,500 rounds through it with Brown Bear, Silver Bear, Wolf Russian Steel Ammunition. I have also fired 280 rounds of Brass 7.72X39 Ammunition, all with ( NO ) malfunctions.

SWEET! I'm looking at replacing my WASR-10 with a 556R and was hoping for a Grendel owner's perspective.

[Wild Geese 1]

SWEET! I'm looking at replacing my WASR-10 with a 556R and was hoping for a Grendel owner's perspective.

I like mine a lot, I would prefer that it would shoot closer to MOA ( I am an accuracy freak ), but with Iron sights it will stay around 2 1/2 inches at 100 yards, and sometimes 2 1/4 inches ( 5 Shot Groups ) with the Silver Bear Steel Ammunition, commercial Ammunition is around 2 inches. I am thinking that if a conversion to 6.5 Grendel is possible the Grendel would be more accurate, and what a great compact package it would make.

[feetpiece]

I'd like to see what she could do with Barnes loaded into Lapua brass - obviously not a blasting round. I'm getting away from tacti-cool rifles since they are virtually useless up here. We have far more four-legged predators than two-legged ones 8-0

[mongoosesnipe]

I like mine a lot, I would prefer that it would shoot closer to MOA ( I am an accuracy freak ), but with Iron sights it will stay around 2 1/2 inches at 100 yards, and sometimes 2 1/4 inches ( 5 Shot Groups ) with the Silver Bear Steel Ammunition, commercial Ammunition is around 2 inches. I am thinking that if a conversion to 6.5 Grendel is possible the Grendel would be more accurate, and what a great compact package it would make.

i would see what it could do with hand loads or maybe hornady steel match it youre not set up for hand loading

[Wild Geese 1]

I'd like to see what she could do with Barnes loaded into Lapua brass - obviously not a blasting round. I'm getting away from tacti-cool rifles since they are virtually useless up here. We have far more four-legged predators than two-legged ones 8-0

i would see what it could do with hand loads or maybe hornady steel match it youre not set up for hand loading

I have been reloading ammunition longer than I wish to admit to, at some point I will work up some loads for the rifle, however it will be with Hornady bullets, because I have 2,000 of them, sorry no Barnes. I have tried the Hornady Steel Match, they shot 2 1/4 to 2 1/2 5 shot groups at 100 yards ( eotech ).