AR15.Com Archives
 30-06 AR Possible?
robsr25  [Member]
12/10/2007 5:08:12 PM EST
Hello. Sorry if this is a noob question as this will be my first build. I want to make a straight pull action AR in 30-06 using this upper: http://www.americanspiritarms.net/store.php?crn=209&rn=397&action=show_detail

As crazy as it may seem, I like the idea of extra accuracy and staying legal in my state (CA). Do they make 30-06 barrels and bolts that I can throw on to this upper? I want a barrel with no gas port. Also can I use any old AR-10 lower?

Thanks!
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Andras  [Member]
12/10/2007 6:26:51 PM EST
.30 Springfield is too long for the .308 length magwell of the AR10 style lower.

Perhaps you could use a non chromelined .308 barrel that is then reamed to match the 63mm case.

It would be a single shot though, feeding rounds manually into the chamber.

I've wondered about the feasibility of a side feeding upper that could accept BAR magazine for a .30Springfield AR.
TRWalsh  [Member]
12/10/2007 7:10:04 PM EST
A few of the guys at cncguns.com were talking about this not too long ago. As stated, you'd have to scale everything up a bit, such as a bigger upper and lower, design a bigger bolt carrier group, get a barrel maker to chamber an AR barrel in 30-06, etc...With today's cnc machining capabilities, it can certainly be done and I think would make some starving machinist a nice bundle of money.

Personally, I'd love one and would buy one today. It's been awhile since we've talked about it. Here's the link...

www.cncguns.com/forum/index.php?topic=273.0

ETA: you have to register to visit the forums, but it's free and is certainly worth it.
ILove2Shoot  [Industry Partner]
12/10/2007 8:07:26 PM EST
contact ASA and see if they can do that for you.
absael  [Member]
12/10/2007 8:16:07 PM EST

Originally Posted By TRWalsh:
A few of the guys at cncguns.com were talking about this not too long ago. As stated, you'd have to scale everything up a bit, such as a bigger upper and lower, design a bigger bolt carrier group, get a barrel maker to chamber an AR barrel in 30-06, etc...With today's cnc machining capabilities, it can certainly be done and I think would make some starving machinist a nice bundle of money.

Personally, I'd love one and would buy one today. It's been awhile since we've talked about it. Here's the link...

www.cncguns.com/forum/index.php?topic=273.0

ETA: you have to register to visit the forums, but it's free and is certainly worth it.


Seems to me like a lot of work (or expense, depending whether you were building or buying it) for the difference in ballistics.
Kaliburz  [Team Member]
12/10/2007 8:24:06 PM EST
There is one already. I saw it a while back in a magazine-this fall. The magwell was removable and used BAR mags. I can't think of who made it though....


ETA-
Found it. Cobb makes it. It's called the Cobb Multi-caliber 300.


Cobb manufacturing presents the Cobb Multi-Caliber 300 Semi-automatic 30-06 Rifle. The perfect tactical AR15 rifle for all your hunting and competition needs. This AR-15 Rifle features a 24 Inch barrel, black Vltor tactical stock, 2 magazines, Hardigg carry case, Harris bipod, Otis cleaning kit, quick detach for sound suppressor, flash hider, and has a 20-round capacity.


Review of Cobb MC series

Cobb link

Cost: $2135.... and all I see online is "out of stock"

More on Cobb MC series 100-400
Security Arms link above.... nice pics and reviews.


MCR Series AR type Rifles for the 21st Century

At Cobb we are proud to introduce the worlds first true multi-caliber AR type rifle for the 21st century. The MCR (Multi-Caliber-Rifle) series rifles are chambered in a long list of calibers, from 9mm to 338 Lapua and pretty much everything in between.

MCR stands for Multi-Caliber-Rifle and it is built on the AR type design. MCR Semi-Automatic rifles come in four different models which interchange with each other from one series to the next. To change calibers for example from a .223 (MCR100) to .308 (MCR200) you simply change the upper receiver and magazine module.

To change calibers on the same series rifle from one caliber to another within the same series for example, on an MCR400 from 300 Winchester Magnum to 338 Lapua Magnum you simply change out the barrel and bolt.
--------------------------------------------------------------------------------

MCR Series Rifle Specifications:

-Upper/Lower receivers and magazine module made out of T6-6061aircraft aluminum.
-Semi-Automatic AR type gas operation.
-Free floated Lothar Walther barrel available in different lenghts.
-M1913 rail machined on the upper receiver.
-AR type pistol grip and butt stock.
-AR type trigger group parts that interchange with standard AR's.
-Rifle weight depending on calibers from 7 lbs to 16 lbs.


If you look at the pics, the uppers are NOT interchangeable w/ the standard mil-spec AR. Take note of the mounting on the back edge where the back of upper mates w/ lower before buffer tube.....

I still want one, despite the cost of over 2K.....
uscombatdiver  [Member]
12/10/2007 8:25:07 PM EST
30-06 vs 308 is not much of a difference. I have used both calibers for hunting and would consider the 30-06 simply because it is what everyone in my hunting party uses. Simple fact is however the 308 is plenty for nearly all your needs and I could not imagine such a build being at all much of a gain. Having said that you can get .50 cal single shot AR uppers and maybe even make a mile shot so I'm sure you could do something similar in the 30-06.
PursuitSS  [Member]
12/10/2007 8:46:40 PM EST
Anything is possible. RND Manufacturing has been building a rifle based on the AR design in .338 Lapua Magnum for several years. It's a heck of a lot longer than 30.06.



PursuitSS
mercedesman  [Member]
12/11/2007 3:02:44 AM EST
If they can build a 30-06 Thompson, why not a 30-06 AR? How much money do you want to spend???
CBR900  [Member]
12/11/2007 6:28:33 AM EST
30-06 is inherently less accurate than a .308 with little to no advantage. Now a 338 Lapua - THAT is worth doing.
LPCVT  [Member]
12/11/2007 8:01:21 AM EST

Originally Posted By mercedesman:
If they can build a 30-06 Thompson


Damn, now that I would like to see!
V8Astro  [Member]
12/11/2007 9:22:49 AM EST
An AR "looking" rifle chambered in .30-06 with a side feed magazine... OMG I'd sell a kidney...

mercedesman  [Member]
12/11/2007 10:22:35 AM EST

Originally Posted By LPCVT:

Originally Posted By mercedesman:
If they can build a 30-06 Thompson


Damn, now that I would like to see!


See yes, carry no... what's a "normal" Thompson weigh, 11 lbs?
In 06 with a 75 round drum............
MrMurphy  [Member]
12/11/2007 10:36:08 AM EST
CDNN has a COBB 30/06 AR on slae for like $2500.00
confused89  [Member]
12/11/2007 2:58:01 PM EST
Go here,
http://www.whittakerguns.com/

Go to the AR section, go halfway down and you will see it. Here are what the descriptions say.

Cobb MCR300 Lothar-Walther 24in Stainless Steel Match barrel & VLTOR stock
MCR300 .30/06 w/2 20rnd mags, Hard carry case, Harris bipod, & Otis cleaning kit $2,239.99


MCR300SCOPE .30/06 w/2 20rnd mags, Hard carry case, Harris bipod, Otis cleaning kit, & Burris 4-12 Laser Range finding Balistic Plex scope $2,959.99
robsr25  [Member]
12/11/2007 3:08:39 PM EST
I didn't realize this was going to be so much of an issue. Are there any other calibers that make a big bang, fly straight, and are cheaper than .308? Ammo prices was my main consideration for 30-06. I want to shoot this gun a lot
mtk  [Member]
12/11/2007 3:23:29 PM EST

Originally Posted By robsr25:
I didn't realize this was going to be so much of an issue. Are there any other calibers that make a big bang, fly straight, and are cheaper than .308? Ammo prices was my main consideration for 30-06. I want to shoot this gun a lot


Then buy a standard AR15 and a Dillon 650XL reloading press.
Tony-Ri  [Team Member]
12/11/2007 5:20:56 PM EST
But .223 will not make a big bang!

My guess is that you want one like one of the mag-fed .50BMG uppers, except in semi.
workhardplayharder  [Member]
12/11/2007 6:19:40 PM EST
Found in article in book of the ar-15 its put out by guns&ammo has the cobbs modular rifle. The same lower can be used with 9mm, .40, .45, .223, 7.62x39, 6.5 gren, 6.8x43, .308, .30-06. With there system change the upper and the marwell disconnects from the lower to except the different calibers. Very versatile systems if you have the $. Hope that helps some.
UtahShotgunner  [Member]
12/11/2007 7:28:35 PM EST
Cobb has been purchased by Bushmaster.

Supposed to be coming out with their rollmark some time soon.
Kaliburz  [Team Member]
12/11/2007 7:54:08 PM EST

Originally Posted By UtahShotgunner:
Cobb has been purchased by Bushmaster.

Supposed to be coming out with their rollmark some time soon.


So the ones that were made under Cobb and has the Cobb name will be 'collector items' someday......

$2K is fairly high just to have a semi auto 30-06 AR. .....but there is JUST something about the '06 that I like.....
brian923  [Member]
12/12/2007 1:54:02 PM EST

Originally Posted By Kaliburz:

Originally Posted By UtahShotgunner:
Cobb has been purchased by Bushmaster.

Supposed to be coming out with their rollmark some time soon.


So the ones that were made under Cobb and has the Cobb name will be 'collector items' someday......

$2K is fairly high just to have a semi auto 30-06 AR. .....but there is JUST something about the '06 that I like.....


well, the M1 is a 30-06 semi-auto... and its alot cheaper.
uscombatdiver  [Member]
12/12/2007 2:31:10 PM EST

Originally Posted By brian923:

Originally Posted By Kaliburz:

Originally Posted By UtahShotgunner:
Cobb has been purchased by Bushmaster.

Supposed to be coming out with their rollmark some time soon.


So the ones that were made under Cobb and has the Cobb name will be 'collector items' someday......

$2K is fairly high just to have a semi auto 30-06 AR. .....but there is JUST something about the '06 that I like.....


well, the M1 is a 30-06 semi-auto... and its alot cheaper.


Don't do it. Don't get a Garand. You will only start thinking something went terribly wrong when they made the M-16 the US military rifle. I have been dealing with that problem most my adult life, it is not pretty. Next thing you know it you will have a BAR next to your Garand and it will all be because some one pointed out that it was a 30-06 and kicked AR butt in the area of dependability (that statement may get me banned from this site).
maypo59  [Member]
12/12/2007 4:00:03 PM EST

Originally Posted By uscombatdiver:


Don't do it. Don't get a Garand. You will only start thinking something went terribly wrong when they made the M-16 the US military rifle. I have been dealing with that problem most my adult life, it is not pretty. Next thing you know it you will have a BAR next to your Garand and it will all be because some one pointed out that it was a 30-06 and kicked AR butt in the area of dependability (that statement may get me banned from this site).


You got away with just having to have a BAR? crap! I ended up with 2 of those, 6 garands, and 3 m14/M1A's.... THEN got into AR's
Kaliburz  [Team Member]
12/12/2007 4:06:24 PM EST

Originally Posted By maypo59:

Originally Posted By uscombatdiver:


Don't do it. Don't get a Garand. You will only start thinking something went terribly wrong when they made the M-16 the US military rifle. I have been dealing with that problem most my adult life, it is not pretty. Next thing you know it you will have a BAR next to your Garand and it will all be because some one pointed out that it was a 30-06 and kicked AR butt in the area of dependability (that statement may get me banned from this site).


You got away with just having to have a BAR? crap! I ended up with 2 of those, 6 garands, and 3 m14/M1A's.... THEN got into AR's




Your collection puts mine to shame.......

Granted, I'm not lucky enough to find 'shooter' grade Garands and M1A's..... (Have only one of each and an AR10).

But I still want a 30-06 AR...... There is just something about 'different Cal AR's that I like.
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