wheelgun51
Member
a friend has a ar15 and wants to replace the 223 upper with a 308.Will this work?
ar15
- Thread starter wheelgun51
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gvnwst
Member
The reasson it won't is that they .223 and .308 use different size mags. The .308 can't fit inside AR-15 mags, that is what the AR-10 is for. You can get more powerful cartridges in the AR 15, but not the .308.
well thats not entirely true, theres plenty of differant caliber uppers that will work with a ar 15 lower
but i know what you mean.
what onmilo wants to say is that the Ar15 lower is differant from an AR10 lower. its shorter, with a smaller magazine well and depending on the type of AR10 you buy, the upper has a differant shape.
long story short, there are some calibers you can freely swap onto an AR15. but .308 (X51 nato) is not one of them
Ask your buddy to put a 7.62 NATO round beside a 5.56 and consider that the magazines have to be of correspondingly different size and that the magazine well on the lower has to be of correspondingly different size as well. He's "see" that the answer is no.
expvideo
Member
I think what Hoppy590 is saying is that "Two different calibers and two different platforms" is true in this case, but that it is not a universal truth about all calibers. For example, you could use a .223 lower to fire a variety of other calibers, by simply changing the upper (and a magwell insert for 9mm). A few of these calibers are:
5.56
9mm
.22
5.45x39
6.8 spc
and so on. However, 7.62 is much longer, so you are absolutely right that it would require a different lower. I don't think that Hoppy was disagreeing with you on that.
5.56
9mm
.22
5.45x39
6.8 spc
and so on. However, 7.62 is much longer, so you are absolutely right that it would require a different lower. I don't think that Hoppy was disagreeing with you on that.
Tarvis
Member
Well if we are going to nit pick what Onmilo and Hoppy said, I guess that leaves everyone open to criticism right?
expvideo: Describing 7.62 Nato/7.62x51 as 7.62 is misleading for the most obvious of reasons. You are asking for someone to misunderstand you and think you are referring to 7.62x39/7.62 Soviet, especially because there are 7.62x39 uppers for the AR platform.
Remember that the AR platform doesn't need a different lower to shoot .308, it is completely incapable; the cartridge needs a different rifle. An AR10 is not an AR15.
expvideo: Describing 7.62 Nato/7.62x51 as 7.62 is misleading for the most obvious of reasons. You are asking for someone to misunderstand you and think you are referring to 7.62x39/7.62 Soviet, especially because there are 7.62x39 uppers for the AR platform.
Remember that the AR platform doesn't need a different lower to shoot .308, it is completely incapable; the cartridge needs a different rifle. An AR10 is not an AR15.
expvideo
Member
An AR is made up of a lower and an upper. Replacing both = new gun. So when I say that you would not only need a new upper, but a new lower as well, that means a new gun. Sorry if that was confusing to you.
It was my understanding, and I could very well be wrong, that there were no 7.62 rounds, 7.62x39 included, that will work with a .223 lower. They require a special lower with a different mag well, from what I've read. I could be wrong, but I've never heard of a 7.62x39 being able to work with a .223 lower. Please let me know if I'm wrong, but please show me an example of a .223 lower that will allow 7.62x39, since it is my understanding that it doesn't exist. Besides, it was already established that 7.62 NATO was the round being discussed, so the only confusion was yours.
BTW, I don't see how my post could be considered nit-picking or hostile in any way, so maybe you could ease up on the hostile tones in yours. I would appreciate it.
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Tarvis
Member
Fallacy. You aren't changing out the lower for a different one you are buying a different gun with a different name. This is not the same as swapping them out.
It was established that .308 was the round being discussed, and yes, you would confuse someone when you're talking about 7.62 in general when referring to the AR15 platform.
We all understood what he said and meant.
I never said it was.
I wasn't being hostile, I was correcting you, and you obviously needed correction. Search google for 7.62x39 AR.
wheelgun51
Member
Thanks for replies.What will a AR10 cost? We live about 45 miles west of Fort Worth Texas.No gun shops left where we are.
i dont even know whats going on in this thread. what i said, what onmilo said... i donno.
my point was that a change in calibers doesn't always necessitate a new lower/gun that some CAN be done on the AR15 and some must be done on AR10 if you want magazine feed. in the case of .308 it does require an AR10 lower.
if you dont want magazine feed, then you can do anything on the AR15 lower including .50BMG (and even one side magazine fed BMG)
my point was that a change in calibers doesn't always necessitate a new lower/gun that some CAN be done on the AR15 and some must be done on AR10 if you want magazine feed. in the case of .308 it does require an AR10 lower.
if you dont want magazine feed, then you can do anything on the AR15 lower including .50BMG (and even one side magazine fed BMG)
R.W.Dale
Member
I've been shooting a 20" 7.62x39mm upper on a plain jane Superior Arms .223 lower for several months now
http://thehighroad.org/showthread.php?t=405210
gvnwst
Member
I think that he was thinking of using AK mags. That would require a different well, but if you use mags designed to use 'x39 in the AR, any regular lower will work.
As for how much AR-10's cost, check out DPMS. Armalite makes them too, but they are more expensive. DPMS had one for as little as $900, IIRC. Many different grades, just like the '15.
Here is the link:
http://www.dpmsinc.com/
As for how much AR-10's cost, check out DPMS. Armalite makes them too, but they are more expensive. DPMS had one for as little as $900, IIRC. Many different grades, just like the '15.
Here is the link:
http://www.dpmsinc.com/
alot. 1k +
there is 2 variations of AR10's. Armalite and DPMS style.
and theres maybe 1/2 a dozen major manufacturers
Armalite style rifles use a slanted cut in the upper reciever. these must use a lower with the same slant cut
http://www.coldwarshooters.net/images/ar-10-stripped.jpg
DPMS style rifles use a rounded cut like an AR15. and require a rounded receiver
http://estore.websitepros.com/stores/829285/images/dpms 308 complete lower.jpg
Upper differance
then rifles can be had in either DPMS magazine format, Armalite Magazie format then some random ones like HK G3 mags and others
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jerkface11
Member
Maybe he should get a custom one? You can get one made in a wildcat called .300 WSSM it fits in an AR15 lower and gets about .3087 ballistics. Of course he'd have to handload for it.
expvideo
Member
Did I say that you would have to "swap" the lower, or did I say "that would require a different lower"?
The person I was responding to had mentioned "7.62 NATO". Since I was responding specifically to him, saying "7.62" shouldn't have been confusing to anyone. You are seriously nit-picking and seriously getting on my nerves.
Kind of like we all understood what I said and meant.
OK, first of all, you are being hostile. Secondly, you are correct about the 7.62x39 AR. I was unaware this. But this shouldn't matter because, again, I was addressing someone else's post, who was talking about 7.62 NATO, so abreviating it to 7.62 was acceptable and didn't confuse anyone but you. Now if you have nothing important to say on the topic, why don't you take your grammar nazi-ing elsewhere and cut this out. There was nothing wrong with my post and you are being unnecessarily hostile.
CYANIDEGENOCIDE
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I'll say it, Yes he can shoot .308 from an ar-15 if he can find an upper that fits his lower. Point of note it will be a single shot rifle ala bohica uppers.
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