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Posted: 7/29/2009 5:53:06 AM EDT
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What is the purpose of the M4 profile barrel?
Common sense would say the back section needs to be heavy. Why waste the time and energy needed to turn it down like that? |
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Quoted:
What is the purpose of the M4 profile barrel? Common sense would say the back section needs to be heavy. Why waste the time and energy needed to turn it down like that? It's the cut for an M203 grenade launcher to attach. It serves its purpose for the military, but it's completely useless for civilians, except to look "cool." |
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Quoted:
Quoted:
What is the purpose of the M4 profile barrel? Common sense would say the back section needs to be heavy. Why waste the time and energy needed to turn it down like that? It's the cut for an M203 grenade launcher to attach. It serves its purpose for the military, but it's completely useless for civilians, except to look"tacticool." |
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Quoted:
Quoted:
What is the purpose of the M4 profile barrel? Common sense would say the back section needs to be heavy. Why waste the time and energy needed to turn it down like that? It's the cut for an M203 grenade launcher to attach. It serves its purpose for the military, but it's completely useless for civilians, except to look"tacticool." +1 |
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The M-4 profile is readily available from high quality manufacturers, lighter than hbar, accurate, reliable. I have no use for the m203 cut but that is what is most readily available from quality manufacturers.
I'd like to see a more common sense barrel style like the Noveske N4 profile used by more manufacturers though. Should give a stiffer barrel with the extra weight making an actual difference. JMHO. |
| To extend the OP's question, why not get rid of more metal in front of the site base? the 203 cut doesn't need that much steel front and real of it. why not have the barrel be the smaller profile full length with only minimal bulk for the 203 mount. Is it a balance issue? etc? |
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I have the M4A1 profile on another upper, heavy under the HG.
It is a good barrel. very accurate even after it is hot. I am building an upper with a smith and wesson MP15 M4 barrel. It is my first time to mess with one like this. I understand barrels flex when hot. AKA noodle effect. Normally the M4 barrel has the handguard attached with the barrel nut/hg cap, essentially it is part of the barrel as it makes contact.. What about a free float M4 barrel, would it be more "whip like" that one with an HG. |
| The original M16 and M16A1 had a light-weight "pencil" barrel profile its whole length. With the introduction of the M16A2 (mid-80s), the barrel thickness was increased between the FSB and the muzzle - my understanding is that this was primarily done to reduce the chance of the barrel getting bent during bayonet drills. The barrel was left thin under the handguards to keep the weight down, and for backwards compatibility with the M203. My guess is that the M4 carbine has a similar profile only because nobody wanted to change it (i.e. inertia at Colt and the US military). I agree that it is a silly profile if accurate shooting is your only design criterion (an HB would be best), but soldiers have to carry the rifle much more than shoot it, so weight is a factor. |
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It's contoured under the handguard to make it lighter. There are M4-HBAR barrels that the SOCOM guys are getting, and they are fat under the handguards. CMMG offers his barrel. Anyone else? You can get a real Colt M4 HBAR from autoweapons.com but they are ridiculously expensive. |
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