14.5 or 16?

Discussion in 'AR-15 Discussion' started by powell0892, Jul 16, 2012.

  1. powell0892

    powell0892 New Member

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    So im sure this is another question that may have already been beat to death but couldnt find anything on it when searching. Trying to decide between 14.5 and 16 upper, I want a middy, I will be getting it pinned with something, not sure what though. Is there a difference? Is it worth extra money? Opinions please!
     
  2. tacticalfun

    tacticalfun Active Member

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    What kind of rail system do you plan on?
     

  3. powell0892

    powell0892 New Member

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    Either Troy 11 or DD omega 9.
     
  4. Quentin

    Quentin New Member

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    You have to be sure which muzzle device you want before pinning!

    Curious, why do you need to pin it, ban state? If you must pin, then either 14.5" or 16 is ok, as long as the total barrel length is > 16". If you're not in a ban state I'd go with a 16" barrel and screw on the muzzle device. Also midlength gas is a little more reliable with lighter loads in a 16" barrel (excluding MD).
     
    Last edited: Jul 16, 2012
  5. Axxe55

    Axxe55 The Apocalypse Is Coming.....

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    i don't know about advantages or disadvantages, but the barrel length has to be at least 16" to be legal. if you use an upper with a 14.5" barrel you have to have a flash hider or muzzle brake that brings it to at least 16" and it will have to be pinned and welded to be legal. if the flash hider or muzzle brake are removeable, then it illegal unless registered as a SBR.

    the barrel length will give or take some muzzle velocity. but an inch and a half isn't probably going to make much difference unless you clock it with a chronograph. shorter barrel might be a tad louder too.
     
  6. tacticalfun

    tacticalfun Active Member

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    Get the 14 then. Heres what the 12 dd looks like with a 16

    ForumRunner_20120716_003307.jpg
     
  7. okdonk

    okdonk New Member

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    +1. Yes.. only 1.5" difference without permanently attached. Can change to any muzzle devices in the future.. if u change your mind.
     
  8. Sniper03

    Sniper03 Supporting Member Supporter

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    Powell,


    Unless you just want one I do not think it is worth the extra money to purchase a more expensive Flash Hider or Compensator like the VORTEX to achieve the desired length and then have it pinned and brazed. All that to end up with an barrel about 1/2 to 3/4 inch shorter than the standard barrel since as you know it must be at least 16" by law unless it will be a class III SBR. with Tax requirements. And the other issue is you want a Midlength which is my personal preference due to the fact you have an additional inch and almost 3/4 extra mounting surface if utilizing a free float quad rail for accessories. And a longer sight radius which is good when using iron sights.
    Good Luck on your selection. But bottom line buy what you like best either 14.5 plus the comp or flash hider but the Mid is a great choice!

    03
     
  9. powell0892

    powell0892 New Member

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    I would only be pinning if I got 14.5 sinceI don't feel like going through all the paperwork I'm in Georgia.
     
  10. powell0892

    powell0892 New Member

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    I was thinking the same thing I just hate that most muzzle devices are quite long.....stupid law. It would be nice to have a 14.5 and be able to change!
     
  11. Jpyle

    Jpyle New Member

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    Since you didn't mention NFA or a tax stamp I am assuming that you do not intend to build a SBR, in which case your 14.5" upper will be a 16" upper anyway, with a 1.5" pinned brake or flash hider. Given the permanency of pinning and the inconvenience of changing out the rail or gas block I would suggest a 16". There are pros and cons to the 14.5" over the 16" but they are irrelevant here. One thing though, a mid length gas system (9") on a 14.5" barrel could be problamatic due to the shorter dwell time. In short, the time between the bullet passing the gas port, which starts the recoil cycle, and exiting the barrel, which releases the inner barrel gas pressure, is extremely short. This could lead to poor cycling and timing isssues.
     
  12. Quentin

    Quentin New Member

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    Personally I think it's a slam dunk then, 16" with a screw on MD. And if you haven't decided yet, just go with the A2 flash hider to start out. Later if you want something else it's an easy swap.
     
  13. powell0892

    powell0892 New Member

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    Great info thanks guys didnt realize about the middy on a 14.5 potentially being a problem but I see it now BCM even says you have to run milspec ammo at all times. Also didnt think about changing rails and what not. So looks like the smart thing for me to do is just stick with a 16 like I had originally planned. Thank you for bringing all of this to my attention this is why I love this forum and the people on it!