Firearm & Gun Forum - FireArmsTalk.com > Long Guns > Auto & Semi-Auto Discussion > AR-15 Discussion > New to the firearms world.....

Reply
 
LinkBack Thread Tools Display Modes
Old 01-22-2012, 01:58 AM   #1
Feedback Score: 0 reviews
 
knutsen24's Avatar
 
Join Date: Aug 2011
Location: Chehalis,WA
Posts: 13
Default New to the firearms world.....

Can someone please tell me the difference between .223, 5.56 and 5.56 NATO? I just put my first AR together and I'm trying to learn as much as I can without moving to fast on this. I got everything (in pieces) but the lower receiver on trade from a buddy. So, I got to put it together which went great and knowing how the pieces work together is a bonus too. Anyway, thanks in advance for any help.

__________________

My budget collection
Mut AR-15 (just like a dog, built from different breeds)
High Standard 12 ga pump
Remington Viper .22 LR
Chipmunk .22 (not for me, for the kids)
Walther P22 (wifes x-mas present, personalized with "momma's peace keeper")
Taurus PT 145 .45
Kel-Tec P3AT .380
Remington 742 .30-06
and growing..... when the wife permits!

knutsen24 is offline  
 
Reply With Quote

Join FirearmsTalk.com Today - It's Free!

Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.

Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.

Join FirearmsTalk.com Today! - Click Here


Old 01-22-2012, 02:00 AM   #2
Feedback Score: 0 reviews
 
Quentin's Avatar
 
Join Date: Apr 2010
Location: Idaho
Posts: 6,468
Liked 940 Times on 665 Posts
Likes Given: 924

Default

5.56 and 5.56 NATO are the same and hopefully you bought a barrel chambered in that. It also will fire .223 but a .223 barrel shouldn't be used with 5.56.

__________________

______
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
________________________________________
US Army 1966-69, VFW Life Member, Retired Geek

Quentin is offline  
 
Reply With Quote
Old 01-22-2012, 02:05 AM   #3
Feedback Score: 0 reviews
 
knutsen24's Avatar
 
Join Date: Aug 2011
Location: Chehalis,WA
Posts: 13
Default

So how do I find out what barrel I have? Should it be marked? I don't remember seeing anything. Thanks.

__________________

My budget collection
Mut AR-15 (just like a dog, built from different breeds)
High Standard 12 ga pump
Remington Viper .22 LR
Chipmunk .22 (not for me, for the kids)
Walther P22 (wifes x-mas present, personalized with "momma's peace keeper")
Taurus PT 145 .45
Kel-Tec P3AT .380
Remington 742 .30-06
and growing..... when the wife permits!

knutsen24 is offline  
 
Reply With Quote
Old 01-22-2012, 02:06 AM   #4
Feedback Score: 0 reviews
 
knutsen24's Avatar
 
Join Date: Aug 2011
Location: Chehalis,WA
Posts: 13
Default

Oh yeah, all I have shot is .223 so far. Isn't there better deals on bulk 5.56 ammo than .233?

__________________

My budget collection
Mut AR-15 (just like a dog, built from different breeds)
High Standard 12 ga pump
Remington Viper .22 LR
Chipmunk .22 (not for me, for the kids)
Walther P22 (wifes x-mas present, personalized with "momma's peace keeper")
Taurus PT 145 .45
Kel-Tec P3AT .380
Remington 742 .30-06
and growing..... when the wife permits!

knutsen24 is offline  
 
Reply With Quote
Old 01-22-2012, 02:20 AM   #5
Feedback Score: 0 reviews
 
dragunovsks's Avatar
 
Join Date: May 2008
Location: West of Louisville KY,Indiana
Posts: 2,309
Liked 201 Times on 138 Posts

Default

Quote:
Originally Posted by knutsen24
So how do I find out what barrel I have? Should it be marked? I don't remember seeing anything. Thanks.
It should be stamped on the barrel or in the case of a complete rifle like mine stamped on the lower receiver. Mine is stamped 5.56mm (.223 cal.) so both can be fired in it.

If its not stamped on the barrel, then contact the location where you bought it and find out.
__________________

Century Arms AR-15A2, 5.56
1946 Mosin-Nagant M44, 7.62x54R
1978 YUGO SKS, 7.62x39
NEF Protector Pump, 12 gauge
Savage Model 64, .22LR
NEF Pardner Tracker II, 12 gauge
Rock Island Armory 1911A1, .45 ACP
Remington 870 'Express Magnum' 12 gauge
Bersa Thunder .380

dragunovsks is offline  
 
Reply With Quote
Old 01-22-2012, 02:46 AM   #6
Feedback Score: 0 reviews
 
Join Date: Dec 2009
Location: Spokane
Posts: 68
Default

Uh - 5.56 can fire .223, not advised for the other way around. There are pressure issues

__________________
lunarmanathome is offline  
 
Reply With Quote
Old 01-22-2012, 05:25 AM   #7
Feedback Score: 0 reviews
 
Quentin's Avatar
 
Join Date: Apr 2010
Location: Idaho
Posts: 6,468
Liked 940 Times on 665 Posts
Likes Given: 924

Default

You have to look at the barrel, hopefully the caliber will be marked, maybe under the handguards. Some barrels aren't though, my Wilson (ArmaLite) isn't. If that's the case contact the manufacturer as dragunovsks said. Of course the lower's caliber markings won't help since you said it's a separate unit.

__________________

______
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
________________________________________
US Army 1966-69, VFW Life Member, Retired Geek

Quentin is offline  
 
Reply With Quote
Old 01-22-2012, 05:57 AM   #8
Feedback Score: 0 reviews
 
75370's Avatar
 
Join Date: May 2011
Location: Traverse City,MI
Posts: 204
Liked 4 Times on 4 Posts

Default

The .223 is designed for less Freebore, .025, therefore it builds pressure faster than the 5.56 chambering. If you have a .223 chamber than stay with that, or your 5.56 ammo will start popping primers and swelling cases.
The 5.56 is designed for .057 freebore and has about 5,000 psi more than the 223.

Forgot to mention that Freebore is the distance your bullet travels before engaging the leades and then the rifling, the sooner a round engages these the faster the pressure spikes.
That's why the NATO round can tolerate the pressure, it has more room for the pressure to expand.
That's why the Weatherby magnums work, they have alotta freebore.

__________________

Last edited by 75370; 01-22-2012 at 08:40 AM.
75370 is offline  
 
Reply With Quote
Old 01-22-2012, 07:09 AM   #9
Ain't she sweet?
FTF_MODERATOR.png
Feedback Score: 0 reviews
 
winds-of-change's Avatar
 
Join Date: Aug 2010
Location: Northern Illinois
Posts: 22,388
Liked 6742 Times on 4073 Posts
Likes Given: 8041

Default

Quote:
Originally Posted by knutsen24 View Post
Can someone please tell me the difference between .223, 5.56 and 5.56 NATO? I just put my first AR together and I'm trying to learn as much as I can without moving to fast on this. I got everything (in pieces) but the lower receiver on trade from a buddy. So, I got to put it together which went great and knowing how the pieces work together is a bonus too. Anyway, thanks in advance for any help.
I can't help you with the ammo question but I am impressed you are "New to the firearms world" and put together an AR!!
__________________
Honor Student: School of Hard Knocks
To the world you may be one person, but to one person you may be the world.
Quando Omni Flunkus Moritatus
winds-of-change is offline  
 
Reply With Quote
Old 01-22-2012, 07:16 AM   #10
Feedback Score: 0 reviews
 
Jpyle's Avatar
 
Join Date: Aug 2009
Location: Sewell,NJ
Posts: 4,815
Liked 762 Times on 441 Posts
Likes Given: 457

Default

Quote:
Originally Posted by winds-of-change View Post
I can't help you with the ammo question but I am impressed you are "New to the firearms world" and put together an AR!!
Come on WOC...try it you'll like it.
__________________

"The whole of the Bill (of Rights) is a declaration of the right of the people at large or considered as individuals.... It establishes some rights of the individual as unalienable and which consequently, no majority has a right to deprive them of." (Albert Gallatin of the New York Historical Society, October 7, 1789)

"A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government." - George Washington

Jpyle is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
World War Z JonM The Club House 2 12-04-2011 03:27 AM
Around the World: Shihan The Club House 0 07-09-2011 01:39 AM
New Too AR-15 World nacraracer AR-15 Discussion 10 02-05-2011 09:09 PM
End of the world? Ruzai The Club House 50 04-17-2010 12:15 PM
what in the world? i want to bag one of these Duddn Hunting Forum 9 01-10-2010 01:31 AM