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SERE Instructor: Why the Daniel Defense MK18 is so popular

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The MK18 is a 10.3 inch short barreled AR-15 made by Daniel Defense. It’s grown in popularity in large part due to its utilization by Special Operators wielding it in the global war on terror. It will do most anything your typical AR-15 can do but better – with a couple of caveats.

When you have a barrel as short as the MK18’s you run into some issues. Mainly dwell time…

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Comments

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  • Avatar
    WayTooMuchGear

    Another point in favor of piston guns. Gas doesn't go all up in your face and you can dial the gas action to account for the can's backpressure. I think a heavier buffer might also help to keep that carrier in position a bit longer to dump some more pressure before coming back.

  • Avatar
    Rick D (The Arms Guide)

    Glad I'm not the only one my YHM and LMT 10.5 does the same thing

  • Avatar
    VooDoo3

    Every time I ever shoot a shorty barrel with suppressor I always get gas blow back right in my damn eye. I don't like it but I guess its a better trade off than weaker ammo.