quick question on colt ar

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[ARCHIVED THREAD] - quick question on colt ar

Posted: 12/31/2005 8:02:45 AM EDT

I already own a colt hbar the receiver is stamped 223 nothing is on the barrel to indicate caliber. I have just read in the forums that 223 & 5.56 are not the same, also found a place on the net saying colt ar's are all chambered in 5.56. Whats the deal are they 5.56 or 223 or one of the in between chambers. When I build my future car 15 it will be 5.56 any way but I would like to use the same ammo for the both of them. Any suggestions? Thanks Mike H.

Posted: 12/31/2005 1:34:42 PM EDT

[#1]

The external dimensions of the cases are the same, but 5.56 is loaded hotter than .223. If the barrel on your rifle is truly a Colt, it will be marked accordingly. I've never seen an unmarked Colt barrel.

Posted: 12/31/2005 3:01:49 PM EDT

[#2]

Not to hijack your thread, but I had been wondering about colt barrel markings. Do "HBAR" barrels actually say "HBAR"? I have a colt target match barrel that is marked 556. What is or would be the difference between the two (HABR & Target match) ?

Thanks for input

Gene

Posted: 12/31/2005 3:03:43 PM EDT

[#3]

Quoted:
Not to hijack your thread, but I had been wondering about colt barrel markings. Do "HBAR" barrels actually say "HBAR"? I have a colt target match barrel that is marked 556. What is or would be the difference between the two (HABR & Target match) ?

Thanks for input

Gene

The Colt I just traded was a Colt Match Target HBAR, and it was stamped "Match Target" on the side, and "HBAR" on the barrel.

Posted: 12/31/2005 4:11:18 PM EDT

[#4]

Posted: 12/31/2005 4:40:51 PM EDT

[#5]

Covert8645 & mm34b~

Thanks for your input. I know now that my barrel is not an HBAR.
It is only marked "C MP 5.56 NATO 1/7" Where would I find out what the difference is between the two (HABR and TARGET MODEL)?

Thanks again and HAPPY NEW YEAR

Gene

Posted: 12/31/2005 5:18:46 PM EDT

[#6]

Quoted:
Covert8645 & mm34b~

Thanks for your input. I know now that my barrel is not an HBAR.
It is only marked "C MP 5.56 NATO 1/7" Where would I find out what the difference is between the two (HABR and TARGET MODEL)?

Thanks again and HAPPY NEW YEAR

Gene

Ahh, gotcha. Not sure though, sorry.

Posted: 12/31/2005 5:25:31 PM EDT

[#7]

what is the diameter of the barrel under the handguard and under the FSB?

Posted: 12/31/2005 5:48:08 PM EDT

[#8]

Tweak,
Under the FSB is 3/4 and under the handguard is 5/16. I'm guessing a HBAR is thicker under the handguards?

Thanks for the lesson guys.

Gene

Posted: 12/31/2005 6:58:04 PM EDT

[#9]

5/16" = 0.3125"

be some damn thin walls with a .224 bore

should be closer to .6

pics of A1 and A2 barrels

Posted: 12/31/2005 7:29:26 PM EDT

[#10]

Damn my eyes!

Yes it is actually 5/8 (.625) under the handguard, and 3/4 (.75) under the FSB.

Glad one of us is paying attention.

Posted: 12/31/2005 9:40:00 PM EDT

[#11]

sounds like a government contour, A2 profile, one step heavier than an A1 but not an HBAR. I'm not sure what contour is used on the Match Targets.

Posted: 12/31/2005 11:08:50 PM EDT

[#12]

Thanks Tweak. Now I know.

Gene

[ARCHIVED THREAD] - quick question on colt ar

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