Non-SBR Glock 21 FAB Defense Carbine Concept

Discussion in 'Free Fire Zone' started by Boba Debt, Sep 1, 2013.

  1. I would like to make a Glock 21 Carbine in a way that does not require and SBR stamp.

    I would use the Gen 2 FAB Defense frame but to make it non-sbr legal I would have to have a 16” barrel.

    My idea is to use a LWD 6.5” treaded barrel and then have a light weight custom shroud/extension to extend the barrel the 16” minimum requirement. It would be pinned and welded

    I think a shroud is the way to go so that you do not have to use custom ammo since still dealing with a pistol length barrel and I doubt anyone will make a 16” solid barrel

    I know some of you think this is a stupid idea but I have built stupider guns :)

    I just need some input on the operation of the gun.

    Does anyone know if the shroud will interfere with the operation of the gun?

    Does anyone actually make a 16" barrel?

    All constructive comments are welcome


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  2. GRT45

    GRT45 Transform & Win

  3. How does that work???

    I mean as the slide goes back, the barrel unlocks. Doesn't the additional length cause issues?

    What about the rounds themselves. Wouldn't the powder burn too fast for that length of a barrel?
  4. I also just read that it is not recommended for the FAB KPOS.

    I'm going to call them tomorrow to find out why.
  5. Ranger357

    Ranger357 Just pixels

    I might be off but did not TC have some type of problem with a similar concept in that with the ATF???

    Something about turning a pistol into a rifle was ok, but when you went then pulled the frame and reinstalled the pistol bbl you had turned a rifle into pistol which is no-no by some legalese convoluted logic?

    Too long ago to recall details, but wondering if this might create same situation.
  6. Your close.

    If you ever turn a pistol into a rifle you can not revert it back to a pistol, which I have no intention of doing. This would be a dedicated gun

    However, for some reason TCs are treated differently by the ATF
  7. Not attempting to hijack your thread, just a thought. No need to reinvent the wheel. I run a KRISS Vector Carbine that uses Glock 21 mags and of course you can add the 10 round extension to that. Flawless performance to date with a 4 K round count.
  8. ...and it's "only" $2000! :supergrin:
  9. SCmasterblaster

    Millennium Member

    Good luck with your project. I'd like to see chronograph results for a 16-inch Glock .40 S&W.
  10. Hell, I'd like to have one of these whether it worked or not.

  11. The welding part would be better off done as silver solder,IIRC that is the way to add a extension,pinning wouldn't hurt either. SJ 40
  12. Is that a RONI....???
    Whts the diff between Gen 1 and 2??

  13. TOO EXPENSIVE, a bit complicated and kind of heavy

    Welding is less invasive then soldering.

    No, it's a FAB KPOS which is made in Israel. From what I have seen the Gen 1 has a side charging handle and the Gen 2 has an AR style charging handle
  14. Due to the cost of the 16" barrel I may just get a tax stamp for this.

    So is this and SBR or an AOW?
    #14 Boba Debt, Sep 3, 2013
    Last edited: Sep 3, 2013
  15. SBR.....although the idea of $5 as opposed to $200 sounds great, this is wishful thinking.
  16. RWBlue

    RWBlue Mr. CISSP, CISA

    AOW allows a forward grip.

    SBR allows stock and if wanted a forward grip.
  17. RWBlue

    RWBlue Mr. CISSP, CISA

    Not true.

    As long as it starts (registered) as a pistol. You can go from Pistol to rifle to pistol.

    The twist is going from rifle to pistol is a problem.
  18. RWBlue

    RWBlue Mr. CISSP, CISA

    Have:The Impulse stock is the most solid.
    Have: FAB stick is the light weight option.

    Don't really want: FAB Roni may be useful, but not if you want to add a suppressor.

    Want and can not find: SIG’s Adaptive Carbine Platform LE is the one I would like to get, but can not find for sale.

  19. You can not, under any circumstance, make a rifle into a pistol. It becomes and SBR.

    There is a lot of conflicting info about this process so I don't know what to believe in this case
    #19 Boba Debt, Sep 3, 2013
    Last edited: Sep 3, 2013

  20. What is a FAB Roni???

    Do you mean a CCA Roni?

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