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AR-15 Pistol Parts

Discussion in 'Gunsmithing' started by MetalCutter, May 22, 2019.

  1. MetalCutter

    MetalCutter Life is too short for cheap cigars!

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    While no stranger to building pistols or working on the AR platform I’ll have to confess a bit of confusion when it comes to picking parts for an AR pistol build. My son and I would like to build an AR pistol in 5.56 from scratch and could use some advice on which parts to choose. A web search results in hundreds (if not thousands) of a dizzying array of lowers, uppers, barrels, BCG’s, etc. My initial reaction was to just buy a pistol and be done with it, but the kid insists on building one. Sooooo…...any suggestions on where to start?
     


  2. Big Green

    Big Green Well-Known

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    How much do you want to spend?

    That would be my starting point. Personally they are kind of novelty and I can’t see spending much on something like that. Get what’s cheap and what works.

    Uppers and lowers can be had cheap. Bear Creek, PSA, and Anderson are all good candidates for a pistol build. Honestly, you can get everything you need to build a pistol from PSA.

    Decide on barrel length, hand guard length and what you are doing for receiver extension. Aside from that it gets pretty easy.
     
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  3. Bithabus

    Bithabus ! TGT Supporter

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    I would go with a standard carbine extension and an SBA3 brace
     
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  4. gshayd

    gshayd Ugliest house on the block.

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    It is the same as building a AR15 Rifle except for pistol buffer tube choice, barrel length, forearm/rail length and the legal brace of your choice. I personally will not build anything shorter than 10 1/2 inches. I built a 71/2" pistol in 223/5.56 didn't like it. In a regular pistol caliber I would have no problem doing a shorter barrel.
     
    Last edited: May 23, 2019
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  5. baboon

    baboon TGT Addict

    I have a 7.5 inch upper on my X-mas to myself gun. A buddy asked if I tried it on the M-16 to see if it ran. His brother & nephew are wanting a 7.5 in for their M-16. When I told him I was having to much fun with it with an echo II he thought I was loosing it.
     
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  6. Dawico

    Dawico TGT Addict

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    Personally I would buy a pistol kit from your manufacturer of choice and build it.

    ARs are so cheap right now it isn't worth shopping around to piece them together to save a buck unless you really want something custom.

    PSA or GZP have plenty of affordable entry level options if that's what you are going for.
     
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  7. Dad_Roman

    Dad_Roman TGT Addict TGT Supporter

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  8. AZ Refugee

    AZ Refugee Member

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    I recently built a 16” 9mm with an Anderson upper and lower, and a Foxtrot Mike barrel and bcg, really like it so far. Went with the Mean endomags and like them as well. Been contemplating a pustol as well with an ATI polymer lower I inherited.
     
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  9. MetalCutter

    MetalCutter Life is too short for cheap cigars!

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    Thanks for all the replies, gave me lots of places to get started.
     
  10. zackmars

    zackmars Active Member

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    Psa is good, just be careful. Their daily deals have a habit of annihilating bank accounts.

    If you want to be as functional as possible, barrels longer than 11" are best.

    The SBA3 is probably the best brace currently avalible, and it uses standard carbine length reciever extensions
     


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