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Thread: SBR'd SCAR (I'm new to this so bear with me)

  1. #11
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    I know a class III dealer who works for my dept and lives out by you. He has a 16 CQC and Ill ask him if he can get any barrels or knows a good guy for the cutting. By the way they have insane muzzle flash.

    http://youtu.be/7h72RrTYvAI
    C co 1/30th Infantry Regiment
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    IraqGunz:
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  2. #12
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    Just like you run the risk of reduced functionality when chopping down a AR barrel, what else do you plan to do to the rifle after reducing the dwell time by so much? Anyone on here know the other changes the OP should make on a SBR SCAR? Are any other changes needed?

  3. #13
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    Quote Originally Posted by C-grunt View Post
    I know a class III dealer who works for my dept and lives out by you. He has a 16 CQC and Ill ask him if he can get any barrels or knows a good guy for the cutting. By the way they have insane muzzle flash.

    http://youtu.be/7h72RrTYvAI
    Thanks brother, let me know what he says. You were not lying about the muzzle flash in the video.
    "Si Vis Pacem Para Bellum"

    Semper Paratus AR-15 Armorer

  4. #14
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    Quote Originally Posted by Moltke View Post
    Just like you run the risk of reduced functionality when chopping down a AR barrel, what else do you plan to do to the rifle after reducing the dwell time by so much? Anyone on here know the other changes the OP should make on a SBR SCAR? Are any other changes needed?
    I dont think there is anything that needs to be done. The rifle was built and intended to be able to do quick barrel changes regardless of length. Also, its piston driven so the gas is regulated so dwell time does not change. I have no facts on this, this is just me trying to make sense of this in my head. If anyone knows of changes that need to be made, PLEASE let me know
    "Si Vis Pacem Para Bellum"

    Semper Paratus AR-15 Armorer

  5. #15
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    Quote Originally Posted by JR TACTICAL View Post
    I dont think there is anything that needs to be done. The rifle was built and intended to be able to do quick barrel changes regardless of length. Also, its piston driven so the gas is regulated so dwell time does not change. I have no facts on this, this is just me trying to make sense of this in my head. If anyone knows of changes that need to be made, PLEASE let me know

    Dwell time does decrease when the barrel chopped. It's simple physics.

    "piston" has nothing to do with it and the system is not really self regulated either.

    A larger gas control screw will need to be used to deliver the required total impulse in the shorter time.

    The gas control screw is accessed with a flat bladed screwdriver through the top of the gas block after the gas plug is removed.

    Tuning is a matter of selecting the proper screw to hit the target cyclic rate.
    Last edited by Clint; 03-29-12 at 14:36.
    Black River Tactical
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  6. #16
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    After chopping the barrel you will need to change the gas control screws. If you do a search over on the fnforum you will come up with all the info you need.

    ETA: Whatever you do, DO NOT let your gunsmith drill out the gas port hole.
    Last edited by liquidsniper; 03-29-12 at 14:31. Reason: ETA: Drilling

  7. #17
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    Does FN offer the different gas control screws or am I going to have to have those custom made?

    nevermind i found the answer
    Last edited by JR TACTICAL; 03-29-12 at 15:10.
    "Si Vis Pacem Para Bellum"

    Semper Paratus AR-15 Armorer

  8. #18
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    You know, if FNH-USA would just make the 10.5" barrel available to US commercial market this whole exercise would not be necessary. This is why I decided against buying anything FN.

    Last year I almost pulled the trigger on buying a SCAR-16 and an FS2000. But when I found out the availability of their parts may be an issue, I decided against it.
    We must not believe the Evil One when he tells us that there is nothing we can do in the face of violence, injustice and sin. - Pope Francis I

  9. #19
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    Quote Originally Posted by Iraqgunz View Post
    The point I was making above is that since the upper has the serial number, you could do what you want as long as the lower is not around or unless you have another upper available.
    If there are just parts and not enough to make a complete rifle then the barrel length won't matter.

    The safe thing to do is not have the rifle and short barrel together until the stamp comes back. With an AR it's a bit easier because you can keep a stripped or pistol lower, then you have constructive intent to make a legal configuration.

  10. #20
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    Wow, what a bunch of misinformation. Rob beat me to it. Any how how bout some SCAR candy? Dipped some more of my parts.....
    FFL/SOT

    Chuck Norris has to maintain a concealed weapon license in all 50 states in order to legally wear pants.

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