Colt Barrel Identification

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[ARCHIVED THREAD] - Colt Barrel Identification

Posted: 8/17/2005 11:58:57 AM EDT

My friend just got a Colt AR-15 that's a few years old.

The top of the barrel says: " C MP 5.56 NATO 1/7 "

Can you tell me anything about these markings? Is this their standard chrome lined 5.56 NATO caliber with a 1/7 twist barrel?

What does the "C MP" mean?

Posted: 8/17/2005 12:08:20 PM EDT

[#1]

Ok..

I saw the tacked thread by 1GUNRUNNER that showed a barrel with these markings.

I still wonder if this is a desirable or standard barrel. Chrome?

Posted: 8/17/2005 12:18:53 PM EDT

[#2]

It's a standard Colt chrome lined barrel. Those are the same markings that are on M16A2 and M4 barrels.

What profile is it?

Posted: 8/17/2005 12:23:58 PM EDT

[#3]

What profile is it?

What's that mean?

AR newbie here....

Posted: 8/17/2005 12:29:22 PM EDT

[#4]

Quoted:
What profile is it?

What's that mean?

AR newbie here....

The "profile" is the barrel diameter from chamber to muzzle.

For example, a 20" government profile is light under the handguards and heavier from the front sight base out to the muzzle.

A standard M4 profile is light under the handguards, heavier from the front sight to the muzzle, and has an about 1" long cutout about 1/2 way between the front sight and muzzle.

An HBAR profile is heavy the whole way out, while a light profile is light the whole way out.

Posted: 8/17/2005 12:49:49 PM EDT

[#5]

20" government profile is light under the handguards and heavier from the front sight base out to the muzzle.

This sounds like it.

Thanks..

About 10 inches of barrel under the handguards looks light...then it thickens back up to meet the sight block on out to the birdcage.

Posted: 8/17/2005 1:09:09 PM EDT

[#6]

does it look like this?

this is my 20in A2

Posted: 8/17/2005 1:33:34 PM EDT

[#7]

Barrel markings detailed here:

ar15.com/forums/topic.html?b=3&f=118&t=241681

Posted: 8/17/2005 2:03:35 PM EDT

[#8]

Quoted:
Barrel markings detailed here:

]ar15.com/forums/topic.html?b=3&f=118&t=241681]

or here -------->Barrel Profiles pictured here

Posted: 8/17/2005 3:15:02 PM EDT

[#9]

does it look like this?

this is my 20in A2

That's the one..

Thanks everyone!!!!!

[ARCHIVED THREAD] - Colt Barrel Identification

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