5.56 barreled 223 Colt question...


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Old 04-17-2013, 06:43 PM   #1
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Default 5.56 barreled 223 Colt question...

I have a friend, yeah, that's the ticket, who

recently acquired a Colt Match Grade HBAR AR15

in 223 caliber(marked on the lower). The bull barrel is clearly stamped

"5.56 NATO-1/7-HBAR".

(Looks exactly like a Vietnam-era M-16)

What I, er, HE was wondering is,

is it safe to fire 5.56 ammo through this rifle, without risking

damage to the bolt, chamber, upper, and springs, and latches

and pins and washers and woodruff keys and stuff?

I must apologize for my friend, because he knows less about

ARs than Owe-bozo knows about ethics in government. TIA



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Old 04-17-2013, 07:15 PM   #2
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Quote:
Originally Posted by therewolf View Post
I have a friend, yeah, that's the ticket, who

recently acquired a Colt Match Grade HBAR AR15

in 223 caliber(marked on the lower). The bull barrel is clearly stamped

"5.56 NATO-1/7-HBAR".

(Looks exactly like a Vietnam-era M-16)

What I, er, HE was wondering is,

is it safe to fire 5.56 ammo through this rifle, without risking

damage to the bolt, chamber, upper, and springs, and latches

and pins and washers and woodruff keys and stuff?

I must apologize for my friend, because he knows less about

ARs than Owe-bozo knows about ethics in government. TIA
The tricky part is the barrel. If it is chambered for 5.56, you are good to go on either ammo. If it is chambered for .223, then only use .223 ammo. The 5.56 ammo is slightly larger in diameter, and will occasionally stick, (on Colts less than others) so you will need remedial action. The rest of the parts can be used with either caliber (actually, if you wanted to switch to AK ammo, all you would have to do is swich the barrel and bolt- mechanically speaking of course, check the laws in your area before pursuing that action). What is stamped on the lower is for legal purposes.


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Old 04-17-2013, 08:49 PM   #3
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Thank you, sir.

My friend feels the only thing worse than

"Click, click, DOH! " is "Click, KA-BOOM!".

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Old 04-17-2013, 09:26 PM   #4
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The chamber is cut into the barrel. If the barrel is stamped 5.56 you're good to go.

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Old 04-18-2013, 05:13 AM   #5
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Thanks, I'll have a range report as soon as I get some

business affairs in order here, go north

and settle some family business, go further north and

visit some relatives and friends, attend a wedding,

and find some ammo for the range.

Holding your breath might not be advisable,(unless you're

standing behind me) but hey, I'm a lousy shot, anyway.

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Old 04-20-2013, 11:05 AM   #6
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Assuming it's a factory upper, wouldn't you defer to that marking? I assume the whole gun is not factory? As an interesting note, the 6920 I just bought is marked 5.56. No where else on any of the paperwork, or box is 5.56 mentioned. Only 9mm, 223, and 7.62......

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Old 04-20-2013, 11:59 AM   #7
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Quote:
Originally Posted by clr8ter
the 6920 I just bought...
That's a lot of guns!
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Old 04-20-2013, 12:08 PM   #8
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OK, Colt LE 6920.

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Old 04-20-2013, 12:14 PM   #9
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The Receiver has nothing to do with the caliber. It is the barrel! So it is good to GO to shoot 5.56 or 223 Remington cal. ammunition having the 5.56 chamber. For example you can put a 6.8 SPC upper receiver and barrel group on the standard AR-15 Lower along with a 6.8 Magazine. Or 458 SOCOM and other calibers by just getting a complete upper!

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Old 04-20-2013, 03:47 PM   #10
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Quote:
Originally Posted by clr8ter View Post
Assuming it's a factory upper, wouldn't you defer to that marking? I assume the whole gun is not factory? As an interesting note, the 6920 I just bought is marked 5.56. No where else on any of the paperwork, or box is 5.56 mentioned. Only 9mm, 223, and 7.62......
DNK they marked uppers. The barrel, however,
is marked ""5.56 NATO". The lower is marked
"Colt".
My issue was with whether the .223 upper
could handle the brawnier 5.56 NATO
caliber, with the heavier bullet weights.

But now I, er, I mean my friend has to wonder if Colt marks it's
uppers?


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