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Upper build questions

Discussion in 'AR15 Articles' started by dsheffield2010, Aug 4, 2019.

  1. dsheffield2010

    dsheffield2010 New Member

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    Aug 4, 2019
    San Antonio, Texas
    Hello everyone I’m new to building an AR 15 and I am wanting to build a couple for me and one for my wife. I’m wanting a 556/223 rifle for defense, and I’m wanting to build two longer range rifles for me and my wife. For her I would like to keep 556, and for me I am looking at the 6.5 Grendel. Mine will use the same lower between both uppers. My questions are would it be better to build a A.R. pistol for my defensive gun or keep the 16 inch barrel (no tax stamp). If so what size pistol barrel should I go with to get the most effectiveness out of the round. As for the 6.5 Grendel what is the best barrel lengths for shots out to 500 yards. My wife is only going to be shooting out to 100 yards off bench so I’m sticking with an 18 inch barrel. I know these are noob questions but would rather know now then spend the money to find out later.


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  2. gshayd

    gshayd Ugliest house on the block.

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    I have AR pistols in 5.56, 10mm and 9mm. I try to keep the barrel length about 10 1/2 inches.
     
  3. Dawico

    Dawico TGT Addict

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    10.5" seems to be the go to pistol barrel length.

    20" for your Grendel will work but longer is better. 500 yards can be done with a short pistol barrel for that round.
     
  4. gshayd

    gshayd Ugliest house on the block.

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    I purchased a used 7.5" barrel in an AR15 pistol. Dayum thing was a noisemaker and the PWS muzzle device that sent everything out the front looked like a Fourth of July fireworks show. Now I know why the guy sold the short barrel.
     
  5. dsheffield2010

    dsheffield2010 New Member

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    Aug 4, 2019
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    Thanks y’all. That’s the answers I needed


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  6. Mikewood

    Mikewood Well-Known

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    Here is another option. A 11.5” barrel is only marginally longer than the 10 but with a 5” C.A.R. Style flash hinder will make a 16” carbine. While this is not important now should pistol length ARs be banned a standard FH like an A2 can be removed and the flash hider mentioned above can be tack welded in place making the pistol a legal rifle.
     
  7. dsheffield2010

    dsheffield2010 New Member

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    Aug 4, 2019
    San Antonio, Texas
    Yeah but trying to find a complete upper within my price range other than 10.5 inches is being a little difficult. in the legality terms of it what the government don’t know won’t hurt them and if they did ever ban a certain type of weapon none of my stuff is registered so they can attempt to find whatever they want.


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