.223 and 5.56mm in a CAR-15

[STEED]

Hello:

I am the original owner of a Colt AR-15 A2 CARBINE .223 Vitage late 1980's

I had purchased some bulk 5.56mm ammo in the past and am now reading articles that 5.56mm ammo may or may not be able to be fired in .223 stamped weapons.

Will my rifle tolerate 5.56mm ammo, and if not are there modifications that can me made to the weapon to allow it to accepts both calibers?

 

[NewGunGuy]

A different barrel!

 

[SJan]

Colt AR-15 A2 CARBINE .223

Is this the marking on the receiver? Can you find a marking on the barrel?

 

[vellnueve]

I have never had a problem shooting 5.56 surplus through my Colt.

 

[Fixxah]

The barrel stamp tells the story. Unless you are loading very light 5.56mm rounds that you put through a chrono I would either hang on to the ammo and build another rifle or just buy a new barrel for the pony.

-tapatalk blows chunks-

 

[rkwjunior]

Hello:

I am the original owner of a Colt AR-15 A2 CARBINE .223 Vitage late 1980's

I had purchased some bulk 5.56mm ammo in the past and am now reading articles that 5.56mm ammo may or may not be able to be fired in .223 stamped weapons.

Will my rifle tolerate 5.56mm ammo, and if not are there modifications that can me made to the weapon to allow it to accepts both calibers?

As far as i know the marking on the barrel is the most important. I've always shot L.C. 5.56 out of my 89' Colt Gov't model with no issues.

 

[jasons]

Will my rifle tolerate 5.56mm ammo

You can either try and see what happens or you can measure and be sure: http://www.m-guns.com/tools.php

and if not are there modifications that can me made to the weapon to allow it to accepts both calibers?

You can ream it: http://www.m-guns.com/tools.php

 

[STEED]

Found barrel markings. 5.56. Thanks to all.