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Hopup Chamber Hard Concave Nub Maxx Model

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Hard concave nub for new Maxx CNC Hopup Chamber Series (M4A, M4i, M4P, M4W).

Use this nub with a straight bucking for maximum accuracy. Best for muzzle energy over 1.5j.

Choose the right nub length based on the size of the window on your inner barrel.


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