14.5 or 16? - Page 2
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Old 07-16-2012, 04:42 AM   #11
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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!
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.
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Old 07-16-2012, 04:49 AM   #12
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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.
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.
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Old 07-16-2012, 04:52 AM   #13
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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!

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