Barrel Length differences

Discussion in 'AR-15 Discussion' started by indyfan, Nov 21, 2010.

  1. indyfan

    indyfan New Member

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    I'm building my first AR and I was wondering if there was a big difference between the 14.5" and 16" barrels.

    This rifle I'm building will most likely be used for Home Defense, Coyote hunting, and Competition.

    I know it's only an inch and a half, but which barrel length do you think better suits those needs?

    thanks for your help
     
  2. Jpyle

    Jpyle New Member

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    Biggest difference I know is that one is legal off-the-shelf the other requires a class III SBR stamp and $200 payment to the BATF.

    Long distance precision shooting and HD (CQB) usually require different barrel lengths, most varmint setups use a 20" barrel whereas a carbine (M4) is typically set up with a 16" or shorter (where legal). Longer barrels increase accuracy over longer distances.
     

  3. willfully armed

    willfully armed New Member

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    That should honestly be 3 different guns.
     
  4. russ

    russ New Member

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    The 14.5 with a permanently attached flash hider would be OK and your best choice for HD. Coyote should be a 20-24" with a bipod on it, and the competition gun would depend on what kind of competition.

    If you really want one gun that could do all those things decently but none outstandingly, a mid-length 18" might bridge the gaps and do it all. It would be pretty long for HD and a little short for varmint hunting, but it might do everything well enough for you.
     
  5. indyfan

    indyfan New Member

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    So a 14.5 requires a special permit?

    I was told if I had a flash hider, I would be able to get the 14.5 without the permit
     
  6. Dillinger

    Dillinger New Member

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    The flash hider must be "permanently afixed" as in welded in place. You can have a ten inch barrel if you want, but the total barrel length with your flash hider/suppressor MUST be a minimum of 16" if the weapon has a fixed or collapsible stock ( IE - It's not an AR pistol ).
     
  7. Jpyle

    Jpyle New Member

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    That's true...but when you permanently affix a 1.5" flash hider you end up with a 16" barrel.
     
  8. Catfish

    Catfish New Member

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    The only difference between barrels of different lenth is velocity and depending on the powder burn rate what that really is. Accuracy is reall not effected by barrel lenth. I use an AR for my up close and personal ( out to 250 yrds) coyote gun and have for about 5 years now. If you want mu idea of the ultamte coyote AR take a looke at the Rock River Coyote. It took me a while for mine to evolve into something close but a firend has one and it`s great. Put a 3 x 9 Leupold scope on it and your set.
     
  9. Sniper03

    Sniper03 Supporting Member Supporter

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    Indyfan,

    The 14" would not be the way to go anyway if you are going to use it for a varmint rifle. And as the guys stated if the flash hider was not permanently attached it would be an SBR (Short Barrel Rifle) and require the federal stamp. Which later would be a hassle if you ever wanted to part with it. Depending on the terrain would depend on what the application is. For example if you hunt a heavily wooded area with shorter shots and walking a lot a 16" barrel might be a good choice. For instance the Rock River Coyote Model which I have is a nice piece. Light, Fast and easy to handle. But generally I would go with an 18" or 20" barrel for the varmint rifle. But once again you stated home defence! The 18" might meet the need in the middle. Keep in mind with the quality of barrels today and with good ammunition even the 16" barreled rifles are shooting 1/2 to 1 MOA groups at 100. A lot of the good quality 18" and 20" varmint models are capable of 1/4 to 1/2 MOA groups on a frequent basis. It is hard to have one rifle to do all things. Kind of like having a Porsche for performance & economy and a VW for economy and performance! Doesn't happen! But you might meet somewhere in the middle.
     
  10. indyfan

    indyfan New Member

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    Thanks for the replies guys, helps out alot

    I'm still in the process of customizing my upper

    What's the difference between a Lite Barrel and a M4 profile barrel?

    is there an accuracy/range difference between the two?
     
  11. willfully armed

    willfully armed New Member

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    pencil barrels will not last as long.

    M4 barrels have the "cutout" for affixing a M203.
     
  12. peabody

    peabody New Member

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    why ?


    why would anyone want less than a 20'' barrel ? in a .223 NATO :confused:

    i've had carbeans'' shot em' then putt em back in the safe.

    they are loud' and most of the carbeans i see guys packing around are ''heavy''

    just get a del-ton ''rifle'' kit, or the olympic arms G.I. rifle.
    the plinker plus , cept its got A1 sights and a 20'' barrel.

    your done. shoot the pee outta it.

    c'on folks. we'er only talkin 4'' of extra barrel. keep it as eugene stoner designed it.[perfection]

    put an A1 stock on it, never look back.

    peabody
     
  13. peabody

    peabody New Member

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  14. mjkeat

    mjkeat New Member

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    A lightweight barrel is simply a standard barrel that has been turned down to a smaller diameter to save weight. The M4 profile will be thicker towards the end and have a M203 cut-out.

    I dont believe the accuracy b/w the 2 would become noticeable until you started dumping mags on full auto.
     
  15. 147_Grain

    147_Grain New Member

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    If only one barrel length is possible for 3 situations, the 18" barrel on a midlength gas system is a great setup.
     
  16. willfully armed

    willfully armed New Member

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