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Flat hop need help

748 Views 4 Replies 5 Participants Last post by  Overwatch97
Once I put the nub on the arm and it's on the barrel and every thing is the arm supposed to be able to move?
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Yes it should be able to move up and down like normal. Do have a hop up with gears or a rotary one? make sure the gears are touching and the one that connects to the arm properly and if its and rotary one make sure the arm is connected to the wheel.
Make sure the nub "isn't" bigger than the barrel cut window.

This is why I advocate ML units and nubs. Drop in simple and less prone to mishaps...for society today...
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Are you using an “M” nub? If so that would explain why it’s not fitting through. You need to cut it so it fits in your barrel window. Either that or lengthen the barrel window itself but that’s a different type of flat hop.
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