All comps now come standard bored for 9mm.
We recommend installation by a competent gunsmith who should also confirm the bore diameter to make sure there is no contact between the bullet and the compensator.
Material: Aluminum
Thread Pitch:11/16"-40
Warning: This product may be alloyed with trace amounts of lead and other elements which are known to the State of California to cause reproductive harm and cancer. To prevent exposure, do not alter the product by welding, grinding, etc. For more information, go to www.P65Warnings.ca.gov.
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