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*** Damn Proud to Be an American Ally ! ***
The Armory:
Colt 6601 - Colt 6731 - Colt 613 - Steyr StG.58 - M1 Carbine - Galil SAR - CZ Scorpion EVO - Franchi PA8 - Glock 17 - Pietta/Colt SAA 1873 - SA 1911A1 Mil Spec - Ruger LCP
Where I put the link to the .223 vs 5.56 sticky, which is at the top of Technical discussion. No one here minds answering a newbe question, even if it has been asked and answered many times. But when one of us provides an answer and it is ignored by the questioner, it gets annoying.
Colt SP6920, LE6920, 6720
BCM Lower/ARP 6.8SPC upper for hog hunting
DD M4V5 clone, Troy 5.56 Carbine, S&W M&P10
PSA Lower/BCM LW 16" middie CHF upper
PSA Lower/BCM LW 14.5" middie upper
2 PSA 18"6.8 rifles, PSA 20" M16A4 clone
Remington 870, Remington 700VTR
SA XDm9, XDm9C, , XD9SC S&W 1911
Ruger GP100, Hawkeye77 Compact 6.8SPC
Kel-Tec KSG, Marlin 336 30-30, HK 45C, VP9
Sig 1911 Tacops, Scorpion 1911, M11A1, P226 Mk25
I asked two different questions. Evidently You are not understandig the second one as Frens, Safetyhit and BRT870 do.With no doubt when You will understand the question You will be the first to find the right answer.
At present don't worry about the repeated question. repetita iuvant
Obviously I don't understand. Twice, you have made posts asking this question
Both times, I have given you a link to a "stickie" in the "AR Technical Discussion," titled 5.56mm NATO versus 223 Remington Chamber Differences. It is a very detailed post, including graphics, describing the very differences you are asking about. I have never addressed your other questions about Colt rollmarks.
Colt SP6920, LE6920, 6720
BCM Lower/ARP 6.8SPC upper for hog hunting
DD M4V5 clone, Troy 5.56 Carbine, S&W M&P10
PSA Lower/BCM LW 16" middie CHF upper
PSA Lower/BCM LW 14.5" middie upper
2 PSA 18"6.8 rifles, PSA 20" M16A4 clone
Remington 870, Remington 700VTR
SA XDm9, XDm9C, , XD9SC S&W 1911
Ruger GP100, Hawkeye77 Compact 6.8SPC
Kel-Tec KSG, Marlin 336 30-30, HK 45C, VP9
Sig 1911 Tacops, Scorpion 1911, M11A1, P226 Mk25
Just to reiterate as I think I posted in this thread 2 years ago...
The Colt MT6400C that I own, and the one that my brother in law owns, both have 5.56 chambers. It is stamped on the barrel C MP 5.56 1/7 or something like that. The barrel is identical to that of the LE6920 except of course that it has a target crown instead of a threaded muzzle. The MT6400 has no comp. The MT6400C has a pinned comp.
If you go by the "chart" the MT6400C is the equivalent of a LE6920 in quality and most on this site would urge you to buy it over a Bushmaster of any model. The only downside to a MT6400C is that it is neutered, but if you are a ban stater like me that is a plus.
I live in a ban state and I own one. The only thing I don't like about it is the fixed stock. I will probably put a Sully on it when I get around to it.
Zanshin
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