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AR Barrel Length

 
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  #15  
Old 11-09-2011, 10:09 PM
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Join Date: Jul 2007
Location: SW Wisconsin
Posts: 222
Re: AR Barrel Length

If going with a straight prairie dog rifle, I like the 24" for the heavier forward weight, and they shoot very well too. The 20" is a good standard and I like a standard .750" gas block for a decent handling rifle. For calling coyotes I built an 18" barreled upper with a .675" gas block and a tapered barrel under the handguard. For as skinny as that barrel is it still shoots 3/4 MOA and is very light and handy with the ACE skeletal stock on the lower. I tend to choose barrel profiles more on the intended use as far as heft and balance vs. any perceived accuracy/velocity gains.
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  #16  
Old 12-18-2011, 02:58 PM
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Join Date: Jan 2010
Location: utah
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Re: AR Barrel Length

Quote:
Originally Posted by trebark View Post
Putting a 24" barrel on an AR is like jamming a square peg in a round hole. Ballistically, you gain little with the extra 4" of barrel if the shots are 400 or closer. As a result, go with 20" for that matter 16" would work just fine too.
the problem with long range accuracy and short barrels with large for caliber powder columns is velocity spread. a 16" 223 has a horrible spread and will string vertically at distance. the 20 is better (minimum recommended for full burn) and a 24 is even better.
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