Of Arms and the Law

Navigation
About Me
Contact Me
Archives
XML Feed
Home


Law Review Articles
Firearm Owner's Protection Act
Armed Citizens, Citizen Armies
2nd Amendment & Historiography
The Lecture Notes of St. George Tucker
Original Popular Understanding of the 14th Amendment
Originalism and its Tools


2nd Amendment Discussions

1982 Senate Judiciary Comm. Report
2004 Dept of Justice Report
US v. Emerson (5th Cir. 2001)

Click here to join the NRA (or renew your membership) online! Special discount: annual membership $25 (reg. $35) for a great magazine and benefits.

Recommended Websites
Ammo.com, deals on ammunition
Scopesfield: rifle scope guide
Ohioans for Concealed Carry
Clean Up ATF (heartburn for headquarters)
Concealed Carry Today
Knives Infinity, blades of all types
Buckeye Firearms Association
NFA Owners' Association
Leatherman Multi-tools And Knives
The Nuge Board
Dave Kopel
Steve Halbrook
Gunblog community
Dave Hardy
Bardwell's NFA Page
2nd Amendment Documentary
Clayton Cramer
Constitutional Classics
Law Reviews
NRA news online
Sporting Outdoors blog
Blogroll
Instapundit
Upland Feathers
Instapunk
Volokh Conspiracy
Alphecca
Gun Rights
Gun Trust Lawyer NFA blog
The Big Bore Chronicles
Good for the Country
Knife Rights.org
Geeks with Guns
Hugh Hewitt
How Appealing
Moorewatch
Moorelies
The Price of Liberty
Search
Email Subscription
Enter your email address:

Delivered by FeedBurner

 

Credits
Powered by Movable Type 6.8.7
Site Design by Sekimori

« Utah passes NFA "must certify" bill; AZ House passes same | Main | Excellent ruling in Delaware »

5.56 NATO VS. .223 Remington chambers

Posted by David Hardy · 18 March 2014 07:59 AM

Via reader Mac Cox comes this post on the differences. I've fired both in my AR-15 without problems, but the post says this is not advisable.

5 Comments | Leave a comment

Motor-T | March 19, 2014 11:01 AM | Reply

The comments section over there made my brain hurt.

Chris (Mainsail) | March 19, 2014 1:23 PM | Reply

A lot of heat but not much light. I have yet to see a commercially made AR with a .223 barrel. All mine and the others I’ve seen are marked 5.56; so you can safely run either.

tom | March 19, 2014 3:22 PM | Reply

The lower receiver on my vintage Colt AR-15 A2 says Cal..223 and the barrel says 5.56 NATO.

Scottie | March 20, 2014 2:18 PM | Reply

I have a .223 Wylde chamber on my Rock River Arms LAR-15, which is specifically intended to handle both 5.56mm as well as .223 ammo.

Works fine, and I suspect other manufacturers are doing something similar whether they are very public about it or not.

SPQR | March 20, 2014 10:07 PM | Reply

The article is largely correct although some points are a bit misexplained.

Chris, many "target" ARs have .223 Rem chambers and I have seen at least one manuf mark a barrel 5.56mm when it had a .223 Rem chamber.

Leave a comment