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Posted: 3/13/2006 6:30:36 PM EDT
I'm shopping for uppers, looking at a CMMG mid-length.

I really like the aesthetics of the 14.5" barrel with the fixed phantom flash hider, but the 16" barrel with an A2 doesn't look bad either.

So my question is this: At what range will I start to notice the difference between a 14.5" and 16" barrel? In this case we're talking 1:7" twist.
Link Posted: 3/13/2006 6:38:43 PM EDT
Link Posted: 3/13/2006 6:45:16 PM EDT
I prefer 16" barrels on mid-lengths and 14.5" on M4.....your milage may vary


Link Posted: 3/13/2006 6:52:46 PM EDT
Get the 16".
Link Posted: 3/13/2006 6:54:49 PM EDT
16"
Link Posted: 3/13/2006 7:01:49 PM EDT
14.5" or CMMG 14.7"+A2
Link Posted: 3/13/2006 7:08:28 PM EDT
get the 16" I have the 14.5 and you are limited if you want to do any work such as removing the FSB or changing the Flash Suppressor with a permanent suppressor.
Link Posted: 3/13/2006 7:25:37 PM EDT
10.5".

Oh oops...I meant grab a 16" I like the 14.5" but it will limit your options if you decide to "accessorize" a bit. The difference between a 16" and 14.5"...erm...0.5" at 300 yards maybe?
Link Posted: 3/13/2006 7:30:58 PM EDT

Originally Posted By bigbore:

Originally Posted By Kalash_223:
I'm shopping for uppers, looking at a CMMG mid-length.

I really like the aesthetics of the 14.5" barrel with the fixed phantom flash hider, but the 16" barrel with an A2 doesn't look bad either.




That would be the only reason to choose a 14.5"

Get the 16" middy



+1
Link Posted: 3/13/2006 7:45:34 PM EDT
I tend to agree with everyone suggesting the 16" for the simple reason of not limiting yourself with a perm. flash hider.

That said, below is just a little ballistic data for you between the 14 and 16 (all else equal). Bullet used was mil-spec 5.56 55gn. FMJ.

MUZZLE VELOCITY:
16 = 3037 fps.
14 = 2911 fps.

MAX ACCURATE RANGE BEFORE GOING TRANSONIC:
16 = 650 yrds.
14 = 600 yrds.

100 YARD BULLET ENERGY:
16 = 862 ft. lbs.
14 = 786 ft. lbs.

MAX RANGE FOR FMJ FRAGMENTATION (2700 fps critical vel.)
16 = about 88 yds.
14 = about 60 yds.
Link Posted: 3/14/2006 4:24:06 AM EDT
Go with a 16", 1-7 twist, chrome lined mid-length barrel!
Link Posted: 3/14/2006 8:32:30 AM EDT
If I had to choose to own just one I would go for the 16. A little more velocity, and a lot less flash. Using the same ammo my 14 with the Izzy puts out a hugh flash ball and the 16 with a A2 birdcage puts out nothing. Sometimes less is better.
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