Firearm & Gun Forum - FireArmsTalk.com > Long Guns > Auto & Semi-Auto Discussion > AR-15 Discussion > 5.56 or .223 does it matter?

Reply
 
LinkBack Thread Tools Display Modes
Old 03-30-2013, 10:01 PM   #1
Feedback Score: 0 reviews
 
Join Date: Mar 2013
Posts: 5
Liked 1 Times on 1 Posts

Default 5.56 or .223 does it matter?

I finally got my hands on a lower after months of searching, $140 not bad. It is labeled cal. .223-5.56. Is there a difference in parts kits and what I mean is do certain lpk's only work with .223 and others with 5.56? I thought both rounds were the same. Also same question for uppers. Just trying to figure out what to buy. Thanks!

image-1178472271.jpg



image-1781958099.jpg

__________________
srohda 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 03-30-2013, 10:13 PM   #2
FTF_SUPPORTER.png
Feedback Score: 0 reviews
 
Gatoragn's Avatar
 
Join Date: Dec 2010
Location: North GA. Back home in Dixieland.
Posts: 3,383
Liked 1158 Times on 647 Posts
Likes Given: 468

Default

There is a difference, not huge, but a difference. Just be sure to use an upper chambered for 5.56 and you can shoot either one.

You can use the lower for any AR15 caliber you want, 6.8 spc, 458 Socom, etc.

__________________
Gatoragn is offline  
 
Reply With Quote
Old 03-30-2013, 10:25 PM   #3
Feedback Score: 0 reviews
 
Join Date: Dec 2012
Posts: 1,236
Liked 385 Times on 250 Posts
Likes Given: 1371

Default

A firearm that marked 5.56mm can shoot both 5.56mm and .223.
they are slightly different w/ 223 being the softer round.

For this reason its ok to shoot 223 in a 5.56 gun but not the other way around.

__________________
https://www.numbersusa.com/content/

Primary Rifle:
LWRC M6A2 w/ Eotech512

Primary Handgun:
Ruger GP100 Royal Phoenix
bluez is offline  
 
Reply With Quote
Old 03-30-2013, 10:30 PM   #4
Feedback Score: 0 reviews
 
Join Date: Mar 2013
Posts: 5
Liked 1 Times on 1 Posts

Default

Alright thanks for the info

__________________
srohda is offline  
 
Reply With Quote
Old 03-30-2013, 11:43 PM   #5
Feedback Score: 0 reviews
 
lbwar15's Avatar
 
Join Date: Mar 2012
Posts: 2,012
Liked 293 Times on 221 Posts

Default

Just get a barrel for 5.56 so you can shoot both. Everything elts is the same.

__________________
lbwar15 is offline  
 
Reply With Quote
Old 03-31-2013, 12:47 AM   #6
Moderator
FTF_MODERATOR.png
Feedback Score: 0 reviews
 
c3shooter's Avatar
 
Join Date: Feb 2008
Location: Third bunker on the right,Central Virginia
Posts: 16,308
Liked 8373 Times on 3623 Posts
Likes Given: 1288

Default

HELLO! pay attention, now! He has a LOWER with that marking!

The critical bit is the UPPER! As said, get a 5.56 upper (or .223 Wylde) and you can shoot either. Marks on the lower do not matter in this case.

__________________

What we have heah is.... failure to communicate.

c3shooter is offline  
 
Reply With Quote
Old 04-08-2013, 08:20 PM   #7
Feedback Score: 0 reviews
 
fsted2a's Avatar
 
Join Date: Apr 2008
Posts: 1,052
Liked 207 Times on 163 Posts
Likes Given: 261

Default

Quote:
Originally Posted by c3shooter View Post
HELLO! pay attention, now! He has a LOWER with that marking!

The critical bit is the UPPER! As said, get a 5.56 upper (or .223 Wylde) and you can shoot either. Marks on the lower do not matter in this case.
Legal wise, the 5.56 and .223 are identical. Like everyone says, going with the upper, you should get the 5.56 so you won't have any mechanical issues. A .223 chambered upper might have some feeding problems with the 5.56 ammo. That said, depending on which state you live in, if you swap with a , say, 7.62x39 upper, you may have some legal challenges.
__________________

"Democracy is two wolves and one sheep voting on what to have for dinner.
Liberty is the well-armed lamb contesting the vote." - Benjamin Franklin

fsted2a is offline  
 
Reply With Quote
Old 04-09-2013, 05:55 AM   #8
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

Most rifle kits have a 5.56 upper but otherwise most kits are crap, though PSA's is good. I'd look for quality parts not the cheapest kit with ugly parts.

__________________

______
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 04-09-2013, 06:32 AM   #9
Feedback Score: 0 reviews
 
nosaj's Avatar
 
Join Date: Mar 2012
Posts: 734
Liked 287 Times on 193 Posts

Default

Quote:
Originally Posted by fsted2a View Post

Legal wise, the 5.56 and .223 are identical. Like everyone says, going with the upper, you should get the 5.56 so you won't have any mechanical issues. A .223 chambered upper might have some feeding problems with the 5.56 ammo. That said, depending on which state you live in, if you swap with a , say, 7.62x39 upper, you may have some legal challenges.
Why would 7.62x39 present legal challenges?
__________________
nosaj is offline  
 
Reply With Quote
Old 04-09-2013, 03:07 PM   #10
FTF_SUPPORTER.png
Feedback Score: 0 reviews
 
EW1066's Avatar
 
Join Date: May 2010
Posts: 292
Liked 67 Times on 40 Posts
Likes Given: 14

Default

Quote:
Originally Posted by nosaj View Post
Why would 7.62x39 present legal challenges?
In a sane world it won't. BUT, an ar that is registered as a specific caliber is "TECHNICALLY" restricted to shooting those calibers. Should a person find themselves in a twist with the BATFE, shooting a 6.8 upper on a lower marked 223/5.56 could be grounds for probable cause for an aggressive investigator or just another charge to pile on. Having a lower marked "MULTI" is far more desirable for avoiding such technicalities.

That being said, The probability is very very slim that the average person will find themselves in such a situation.

If you live in a state that is less than friendly towards guns. If you are shooting at a public range where LEOs also shoot. If they think your rifle does not "sound" correctly, they could come over and do a visual inspection of your weapon and life gets difficult from there. This applies to shooting a .22 cal conversion kit as well.


EDUB
__________________

When injustice becomes law, rebellion becomes duty.

Thomas Jefferson


Last edited by EW1066; 04-09-2013 at 03:17 PM.
EW1066 is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
Gun Control No matter what your opinion, you need to see this molonlabexx Legal and Activism 0 03-26-2013 11:39 PM
gun belt, does it matter? Krisms Concealed Carrying & Personal Protection 29 12-24-2012 05:18 PM
What's a few more days matter? flyingbrickracing Concealed Carrying & Personal Protection 5 02-13-2010 02:09 AM