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Thread: Keymo R9 compatibility

  1. #1
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    Keymo R9 compatibility

    Im putting keymo on a YHM R9.
    I read the break doesnt work, but what about the DA FH?
    Does anyone have measurements from rear of the can to the 1st baffle?

  2. #2
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    The KM flash hider is even longer.

    You may need to run Keymicro instead.

    What caliber and barrel length?

    YHM has measurements posted right on the web site.

    From memory, R9 is 1.43"

    Black River Tactical
    BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
    BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
    BRT Bolt Carrier Groups M4A1, M16 CHROME
    BRT Covert Comps 5.56, 6X, 7.62

  3. #3
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    Keymo adds 1.22”. So thats 2.65” to the first baffle. The wrench flats on the devices add .2”, so 2.85” max OAL for the muzzle device. You don’t want the device right on the baffle, and you also have to subtract a hair for measurement errors/tolerance stacking, but it sounds like most devices would fit. 6315KM certainly would. What you can’t use is anything meant to p/w to a 13.7”.

    As Clint said, what caliber and threads are we discussing?

  4. #4
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    A good starting point for standoff or gap between the end of the device and blast baffle is .350"

    That puts the target muzzle device length <2.500".
    Black River Tactical
    BRT OPTIMUM Hammer Forged Chrome Lined Barrels - 11.5", 12.5", 14.5", 16"
    BRT EZTUNE Preset Gas Tubes - PISTOL, CAR, MID, RIFLE
    BRT Bolt Carrier Groups M4A1, M16 CHROME
    BRT Covert Comps 5.56, 6X, 7.62

  5. #5
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    Thanks guys. I'm looking for a mount for an AK, 14x1lh

  6. #6
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    Quote Originally Posted by MegademiC View Post
    Thanks guys. I'm looking for a mount for an AK, 14x1lh
    JMAC or Griffin.

  7. #7
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    Thanks for the info guys, I'm likely going for the FCD 1210KM.
    I have the 1215 on my precision build and really like it.

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