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Old 08-08-2009, 08:18   #1
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Bushmaster XM15E2s 11.5" HBAR with 5.5 " Flash suppressor

Hi i am new to this forum i was wondering if anyone has any good information about this gun ? I bought it in april 2009 i was wondering why they designed a 11.5" barrel with a 5.5" flash suppressor for? what are the uses for this barrel is it effective short range or long range?
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Old 08-08-2009, 12:39   #2
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the length of the suppressor is to make the overall barrel length at least 16 inches, ie, make it legal to own without a permit.
My Bushmaster XM15-E2S has a 14 inch barrel, with a three inch permanently attached AK style muzzle brake.
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Old 08-14-2009, 13:57   #3
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I agree with Mannlicher its to keep the boys at ATF happy. My bushmaster is the same as Mannlicher's and I like its ak comp. better than the others so far.Their really nice guns
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Old 08-14-2009, 17:22   #4
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just wonder why they make 11.5" barrel for whats the purpose? they are only effective out to 40 meters i was told...past that you need a 16 inch barrel or longer for the bullet to fragment?
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Old 08-14-2009, 17:39   #5
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Originally Posted by Valor View Post
just wonder why they make 11.5" barrel for whats the purpose? they are only effective out to 40 meters i was told...past that you need a 16 inch barrel or longer for the bullet to fragment?
I don't know who told you that, but they misspoke.
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Old 08-14-2009, 17:46   #6
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care to elaborate on how they misspoke? can u prove them wrong for me? any proof or links? i know the shorter the barrel the less the velocity the bullet has at longer distances... thats all i know nothing about bullet effectiveness.
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Old 08-14-2009, 18:53   #7
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Valor I have never heard that either. Bushmaster says they used the short 11.5 barrels for law enforcment to give more room working around things like squad cars,buildings,close quarters.
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Old 08-14-2009, 19:01   #8
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yes but mine has an extra 5.5 inch flash hider i have a 11.5" hbar barrel i was wondering what the pros and cons are for that barrel ? how well do they perform for self defense or SHTF?
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Old 08-14-2009, 19:09   #9
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I would think that barrel would be fine for self defense with or without the flash hider. I sure wouldn't want to be looking down the wrong of that barrel.
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Old 08-15-2009, 20:23   #10
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Short barrels make it easy to move around in close quarters, like clearing a house. It looks like someone had some extra 11.5" barrels and needed to offload them so they stuck a long flash hider on permanently to sell it to someone outside of law enforcement.

BTW, shorter barrels tend to be more accurate than long barrels when using smokeless powder rounds.





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Old 08-16-2009, 07:56   #11
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are smokeless powder rounds factory loads? what kind of bullets are smokeless powder?
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Old 08-16-2009, 08:33   #12
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Smokeless powder versus black powder. Smokeless powders can be tailored to fit specific applications. Black powder usually requires longer barrels to fully burn and produce accurate rifles. That's why most non-military Sharps rifles have huge barrels, and that's why you can hit 1000 yard targets with them.

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Old 08-18-2009, 10:07   #13
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Originally Posted by Valor View Post
yes but mine has an extra 5.5 inch flash hider i have a 11.5" hbar barrel i was wondering what the pros and cons are for that barrel ? how well do they perform for self defense or SHTF?
That was a popular configuration for Bushmaster back in the 80's and 90's because it mimicked the XM177 (Vietnam era "shorty").... That 11.5" barrel will be just fine out to 100 yards. Best advice? go shoot it--enjoy it. And it makes a great "SHTF" weapon; it looks intimidating as all heck, if nothing else...
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Old 08-18-2009, 18:08   #14
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Valor if I was to run into you pointing that barrel my way I would be trying to blend in with the wood floor or the tile grout!
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Old 08-18-2009, 20:35   #15
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now thats funny, i was hoping someone could help me with the performance of my Bushmaster... i am hoping my shorty barrel isnt effecting my performance inside of 100 yards thats all the distance i am asking for inside of 100 yards.
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Old 08-19-2009, 06:30   #16
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Have you actually shot this rifle yet? From what you're saying, it sounds like you haven't even touched a round off.

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Old 08-19-2009, 13:43   #17
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oh i fired over 400 rounds thru it so far. thing is i dont know how fast the bullet is going or how hard its ginna hit the target or if it has fragmentation when it hits the target. its accurate but thats not everything i want stopping power out of a 11.5 inch barrel.
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Old 08-19-2009, 13:50   #18
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From reports I've read, the shorter barrel 5.56 is okay, but not great. Do you have access to a chronograph? That would probably be a big help.

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Old 08-19-2009, 15:11   #19
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my Bushmaster barrel says B MP 5.56 Nato 1:9 i have a 5.56 NATO chamber i can use Nato rounds which would give me a little bit more performance then regular .223 rem bullets is what i was thinking, i have both .223 rem and 5.56 XM193 bullets i like the 55 gr i never fired the heavy bullets which i think would be better for short barrels with 1:9 twist. i am sure its effective enough but if anyone has experience can i have the info?
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Old 08-19-2009, 18:41   #20
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Originally Posted by Valor View Post
now thats funny, i was hoping someone could help me with the performance of my Bushmaster... i am hoping my shorty barrel isnt effecting my performance inside of 100 yards thats all the distance i am asking for inside of 100 yards.
This article may help you find the answer you are looking for....

http://findarticles.com/p/articles/m...7/ai_68704858/

As for experience, I don't have any personal experience with short barrels against human targets (we used the 20 inch M16A2 back in my day), but guys I know that have been to the Sandbox recently tell me pretty bad things about the M4's terminal performance at anything longer than room clearing distance. Just FYI, the M4 has a 14 inch barrel.

As for why your rifle has an 11 inch barrel and a 5 inch flash hider, it is purely a cosmetic thing to make the gun resemble the old XM177E2 of the Vietnam era. Think of this as the grandfather of the M4. You can get more info here...

http://www.mooremilitaria.com/reference.htm
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Old 08-19-2009, 19:43   #21
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If you're doing home defense, that's about perfect. Anything else, get another upper. It's fairly simple to do, push two pins, remove one upper, put the new upper in, push the pins back in. They're all built to the same specs, so you could conceivably get a 24" upper and put it on that lower you have. Uppers run from $450 to however much money you want to spend. And there are several other calibers you can use. If you want better long range accuracy, try one with at least a 16" upper. Good luck!

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Old 08-20-2009, 13:28   #22
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There is nothing wrong with that upper for targets out to 100 yards... If you're hitting what you're aiming at, what are you worried about? Will it shoot with a 20" barrel out to 350 yards? Heck no. But that's not what you're looking for.

As far as "terminal performance" is concerned, rest assured that a 5.56 round still sizzles at 100 yards, even from an 11.5" barrel. The "reports" of inadequate performance from "troops in the field" are nothing more than typical battlefield grumblings--the same thing has been said about the A1's, A2's, SS109, XM193's, etc. Some will argue for bullet fragmentation, others for penetration, yet others for destabilization (don't believe me? search for all the "5.56x45 effectiveness" debates online--it will drive you batty).

Frankly speaking, that weapon should be pretty darned effective for anything you might encounter in an urban setting. Live on a farm? In the sticks? You might need something with a bit more reach, and as others have mentioned, a simple top-end swap will fix it for ya'. Me? I really like the shorter barrel in my home, with Hornady's in the mag...
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Old 08-20-2009, 14:17   #23
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what would be the best grain bullets? 45 ,50 ,55gr? out past 100 yards i would use 45 gr HP they would be effective in speed and fragmentation past 100 yards. i feel 55 gr FMJ is best all around round for my 11.5"barrel in the 5.56x45mm size.
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Old 08-20-2009, 14:42   #24
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Generally speaking, and dependent on your twist rate of course, the heavier the better for the SBR's.
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Old 08-20-2009, 18:27   #25
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i have a 1:9 twist
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