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Posted: 10/15/2004 11:31:05 AM EDT
[#1]
When did that happen? I had not heard that.
Steve |
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Posted: 10/15/2004 11:32:15 AM EDT
[#2]
?? The military does NOT use HBAR on the M16A2/A3/A4. It looks like an HBAR after the front sight tower, but under the handguards it is thinner. An HBAR AR (20") rifle weights 8.5 lbs, an M16A2 weights 7.5 lbs, even though they look pretty much the same with the handguards on. |
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Posted: 10/15/2004 11:34:57 AM EDT
[#3]
yeah, it's thicker up front to either: a. prevent the rifle from being used as a prybar or b. prevent damage to the rifle WHEN it is used as a prybar |
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Posted: 10/15/2004 11:35:19 AM EDT
[#4]
Evolution of the AR-15
Perhaps HBAR is the wrong terminology. Why did they increase the barrel diameter? |
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Posted: 10/15/2004 11:36:30 AM EDT
[#5]
More accurate, works better with the M203, and harder to damage than the 'light' barrel...
The M16A2 was designed by the USMC rifle team, and 'make the lightest rifle possible' was not on the priority list... |
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Posted: 10/15/2004 11:40:42 AM EDT
[#6]
When you say "more accurate", are you meaning mechanical accuracy improvement, or improvements to allow the operator to shoot it more accurately? |
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Posted: 10/15/2004 11:48:30 AM EDT
[#7]
Both Heavy barrel -> less 'whip' -> intrinsically more accurate More weight -> easier for operator to shoot accurately |
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Posted: 10/15/2004 11:53:14 AM EDT
[#8]
OK. So, the root of my question. Do the currently availiable "lightweight" barrels, like those offered by JT, Bushmaster and Colt (Govt. Profile), have an A2 profile or A1 (this is the "pencil" profile I guess??) profile?
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Posted: 10/15/2004 12:13:40 PM EDT
[#9]
Govt Profile is A2 Other 'light' profiles are all over the map... Just get the HBAR and carry the extra 1lb... |
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Posted: 10/15/2004 12:18:26 PM EDT
[#10]
Nah, my new project is going for the lightweight thang. Already have an HBAR. Just wanted to know if I was missing something. |
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Posted: 10/15/2004 12:26:06 PM EDT
[#11]
You can get gov't profile barrel from Bushmaster. If you call them up they might even have one in a 1/7 twist for you.
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Posted: 10/15/2004 12:40:22 PM EDT
[#12]
The Bushmaster NM HBar is about 1" under the handguards and stems down to about 0.75" near the flash hider.
My 24" franken AR15 weighs about 9 lb, the same as my 16.5" Vepr K  
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Posted: 10/15/2004 12:42:51 PM EDT
[#13]
"A1" Profile = pencil/lightweight (.610") over the entire length of the barrel.
"A2" or "M4" Profile = lightweight under the handguards (.620"), heavy (.710") from the FSB forward. "HBAR" Profile = very heavy (.920") under the handguards, heavy (.710") from the FSB forward. "Bull" Profile = extremely heavy (1.10") under the handguards, very heavy (.920") from the FSB forward. These numbers are approximate, and may vary slightly from different manufacturers, but you get the general idea. -Troy |
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Posted: 10/15/2004 12:44:17 PM EDT
[#14]
I don't find the extra pound too bothersome...my biceps can handle it. I own a gov't profile as well, I don't think the difference is all that. If you've got an HBar, keep it. If you want to buy a 20" rifle, get the gov't profile.
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Posted: 10/15/2004 1:58:25 PM EDT
[#15]
You missed the point. ARs were ment to be light. If I'm gonna carry a 9lb. rifle around it's gonna be 7.62NATO.
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Posted: 10/16/2004 5:41:36 PM EDT
[#16]
I thinks ya right on that one. If/when I get my first 20" 'er it'll be govt. profile for that reason. I'd rather carry an extra pound of ammo, than a pound of barrel diameter. Tex78 |
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Posted: 10/16/2004 6:36:41 PM EDT
[#17]
I ordered a 20'' gov't profile barrel from Bushmaster almost 2 weeks ago now.... and I'm still waiting........
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Posted: 10/16/2004 6:54:11 PM EDT
[#18]
I like HBAR profile for CMP use, Government profile for SPR type use, and pencil barrels for a 'carry around' carbine.
For an M16 a heavy barrel can sustain more automatic fire before meltdown. I am starting to like heavier barrels on my full autos that I use for fun mag dumps. |
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Posted: 10/16/2004 7:36:59 PM EDT
[#19]
The military went from A1 to G'ment profile. There have been TWO barrel profiles for 20 inch M16 barrels.
In Fiscal Year 01 they added 4 ounces of steel under the handguards of the M4A1, as compared to the M4 and earlier M4A1s. |
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Posted: 10/16/2004 7:46:18 PM EDT
[#20]
The Addage of field expediancy: If it's handy, use it! Easier to requisition replacements, than it is to re place requisitions (for the proper tools, that is!)  Many of us who had rifles in the service did use the rifle for a great many things besides hosing bullets. I have seen many incidences of M16's used as door stops, hatch supports on Bradley's, 113's and M1's. Prybar is certainly a function of a rifle in the field (weather legitimate, or not is another discussion  )While we are on the topic of addages, Here's another old addage we applied liberally, especially while drinking at local German Establishments: If you take soemthing that ain't nailed down, it not considered stealing. If it IS nailed down, it can always be pried up. Cheers! |
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