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Would like to build a 9mm version of sig Rattler

Discussion in 'NFA Firearms and Accessories' started by 2A_n_AL, Mar 11, 2019.

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  1. 2A_n_AL

    2A_n_AL Member

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    Good morning all,
    I would like to build/buy a 9mm SBR similar to the the Sig Rattler SBR, is this possible? if so will you please provide me where to look for an upper. I am new to this build idea however, I have believe I would need a piston upper, is this correct? if so does it exist? where?

    Thank you for you time and input.
     
  2. Madcap_Magician

    Madcap_Magician Member

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    A 9mm Rattler would basically be an MPX. I suspect the grip is interchangeable. I have not see the Rattler handguard configuration available elsewhere yet, though.
     
  3. MachIVshooter

    MachIVshooter Member

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    most 9mm ARs are blowback. The MPX is gas operated, and the CMMG Banshee is radial (rotary) delayed blowback. If you plan to suppress it, those two are far and away the best options.
     
  4. Sebastian the Ibis
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    Sebastian the Ibis Member

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    Mach, how do the Banshee and MPX compare to the roller locked MP5 suppressed?
     
  5. MachIVshooter

    MachIVshooter Member

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    I don't have personal experience with either, but locked or delayed will always be much quieter than blowback. Even really heavy bolts like the >2 pound one in my Suomi don't delay enough to keep port pop down to what I'd consider pleasant levels. The lighter the bolt, the worse it is; my hand made ultralight 9mm pack rifle has a 12.2 ounce bolt, and shooter's ear levels run between 145-149 dBA no matter what can.
     
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  6. pdsmith505

    pdsmith505 Member

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    I'm not aware of any AR-platform 9mm uppers being offered (regardless of blowback, delayed blowback, piston, DI, etc) that do not require a buffer tube. You won't be able to get the folding stock, or a fully collapsible stock as a result of that.
     
  7. Madcap_Magician

    Madcap_Magician Member

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    Sig MPX. But I think the lower is specific to the gun for all that it's similar to an AR-15 lower, so you can't just build a Frankengun.
     
  8. vtsteve

    vtsteve Member

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    That’s correct. The only AR pattern parts on the MPX are the trigger group (that’s got its own idiosyncrasies), and the grip. Everything else is specific to the MPX, and some parts aren’t even interchangeable between Gen 1&2.

    The MPX and MCX can use the same stocks, but they are obviously not AR pattern.
     
  9. LiveLife

    LiveLife Member

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    Another option to consider is 4th generation CAA Micro Roni using Glock 17/19 using factory length or longer barrels.



    Non-NFA versions





    And the 16" carbine option

     
    Last edited: Mar 22, 2019
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  10. MachIVshooter

    MachIVshooter Member

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    Even if you sort out the barrel length issue, suppressors don't play well with Glocks in the Roni chassis.
     
  11. CDR_Glock

    CDR_Glock Member

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    True. I did heavy modifications to make mine work.

    I used a 10” IGB Austria barrel, used a Dremel on the CAA Gear Micro Roni Stabilizer and changed out recoil springs.
     
  12. BLB68

    BLB68 Member

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    There are a few adapters that let you do a folding stock with a buffer tube, but of course you wouldn't be able to fire from the folded position.
     
  13. MagnumWill

    MagnumWill Member

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    ...a way to sort of sidestep that is with a Dead Foot Arms folding stock or brace, where the buffer tube is quite abbreviated. Some tuning would definitely be needed though since those are typically set up for standard 5.56 guns.

    Would certainly look awesome, however.
     
  14. MagnumWill

    MagnumWill Member

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    I chose to build my 9mm, and I have a preference for the Colt SMG stick mags.

    This one's my MP5-inspired QC10 pistol build, in it's latest version. I think this is the way I'll leave it - it's a blast to shoot and it runs perfectly.

    [​IMG]
     
  15. MagnumWill

    MagnumWill Member

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  16. LiveLife

    LiveLife Member

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    Still can't see pic even at link.

    I do this to post pictures already uploaded to web.
    • Right click on picture and select "Open link in new tab"
    • When new window opens, copy address
    • Open THR reply box/edit post box and click on "Image" button and paste address
    • Click "Post Reply/Save Changes"
     
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