The conversion you're referring to is restricted to the cartridge family based on the .223 cartridge, or a cartridge that is shorter in length than the .223. The .308 Winchester will never be converted to from a .223 platform from a weapon such as a Colt 6920, 6940, and so on. The major components are just too small. :?
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

*EDIT*
I forgot to mention, this doesn't apply to the 50 cal. single shot "conversion" upper.


PEACE THROUGH STRENGTH

 

I was going to say, you need a new upper, AND a new lower (a different gun in other words).

Like the Sgt said, the .308 cartridge is too long to fit into a .223 lower.

 

So how do I do that?

You can't.

I understand that I have my Colt upper and its lower, what I am curious is can I buy just a new upper and keep the lower intact without any modification(s)? or does the lower have to be modified too?

The .223 and .308 lowers are a different size and shape. Even if it was possible to alter the Colt lower to take a .308 upper you'd never be able to mount a .223 upper on it again. Better just to buy a AR10 rifle and be done with it.

 

Maybe this will put it into perspective

 

Maybe this will put it into perspective

WOW, the .223 lower is MUCH BIGGER than the .22LR lower. I didn't realize they were that different! Thanks for the picture. :shock:

PEACE THROUGH STRENGTH

 

watch it or Ill post a picture of my .22 short.. :-D

 

Now that would really put things in perspective! :lol:

PEACE THROUGH STRENGTH

 

Now that would really put things in perspective! :lol:

PEACE THROUGH STRENGTH

Quit laughing at my "Pee Shooter"

 

You'll go blind if you keep doin' that! :NO:

PEACE THROUGH STRENGTH

 

You'll go blind if you keep doin' that! :NO:

PEACE THROUGH STRENGTH

Will you please increase your font size. Im finding it difficult to read

 

Now that would really put things in perspective! :lol:

PEACE THROUGH STRENGTH

Quit laughing at my "Pee Shooter"

I saw that in Brussels. My group was looking for it, not really knowing where we were going. We were at a street corner and we saw some people looking at one of the corner's and we were wondering what they were looking at. We turned around and saw the peeing boy statue.

The thing is maybe 18 inches high. It was kind of disappointing. I saw a chocolate version that was bigger.

Here's the pic I took:

It was at night, so it's not the greatest pic

 

Holy Cow whats the odds of this!

 

Holy Cow whats the odds of this!

I posted that in January when I was over there, so it was in your sub-concious, there-fore, the odds were pretty good, or am I over-analyzing? :-D

 

:-D

I google image searched "Pee Shooter" and that was on the first page

 

:-D

nice

 

It was kind of disappointing. I saw a chocolate version that was bigger.

Here's the pic I took:

So, you were hoping to catch a glimpe of a huge one, eh? :evil: :-D :razz:

You... don't have a gf, do you?... :-D

PEACE THROUGH STRENGTH

 

I figured bullet length would play a part in it. So I can only convert down, which means .22 LR... :-(

 

I figured bullet length would play a part in it. So I can only convert down, which means .22 LR... :-(

there are other calibers. Go to sites like DPMS,Rock River Arms and see

 

6.5 Grendel and 6.8 SPC are based on the 5.56 length.

 

Maybe this will put it into perspective

What manufacturer makes the 308 receiver in this picture?

Thanks.

 

6.5 Grendel! Mine is almost done, I'm just dragging my feet on getting the scope ring unimount. Quality ammo is hard to come by too but I've got almost everything necessary to do some reloads.

 

Holy Hi-jacked thread Batman!

 

It's staggering how many options there really are ... long live the EBR! :x

AR-15, without bolt modification
.17 Remington
.20 Tactical
.204 Ruger
.221 Fireball
.222 Remington
.222 Remington Magnum
.223 Remington (5.56x45mm)
.223 Remington Ackley Improved
6x45mm
6mm Whisper
6.5mm Whisper
7mm Whisper
7mm TCU
.300 Whisper (.300/221, .300 Fireball)
.338 Whisper

AR-15, with bolt modification
223 WSSM
5.45x39mm (.21 Genghis)
243 WSSM
6mm PPC
6mm BR Remington
6.5mm PPC
6.5mm Grendel
25 WSSM
6.8x43mm SPC
.30 Herrett Rimless Tactical (6.8x43mm case trimmed to 41mm and necked up to .308; the 6.8mm version of the .300 Whisper)
7.62x39mm
.30 RAR
300 OSM
.357 Auto
.35 Gremlin (necked up 6.5 Grendel to 358)
.358 WSSM (various names, but all are some form of a WSSM necked up to 35 caliber, some are shortened to make them big game legal in Indiana)
.458 SOCOM
.50 Action Express
.50 Beowulf

AR-15 using a simple blowback operation
.17 HMR
.22 LR
.22 WMR
9x19mm
40S&W
10mm Auto
45ACP

http://www.oa2.org/forums/viewtopic.php?t=6883

 

I would actually consider converting it to be able to shot a .45ACP, I REALLY like that idea.

...So would I need a new upper, barrel, and bolt, as well as mags?

 

What manufacturer makes the 308 receiver in this picture?

Thanks.

thats a DPMS