Have this, basically new, Herrington Arms compensator HCMP for the M&P 2.0. Per their website, this comp fits M&P 2.0's with up to a 5/8" barrel protrusion and 1/2-28 threaded barrel. I ran this on an 2.0 Metal full size. Ran about 75 rounds through it a few weeks ago at the range. Just decided to go a different route with my firearm. Original packaging and mounting hardware included. Might look dinged/scuffed as this is a blem version but does not affect functionality. 
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