Greg, it fits 13.5 x 1mm thread pitch. To convert to the highly popular 1/2 x 28 all you need is this adapter : infiniteproductsolutions.com/adapters/135LH-1228-BS/
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Anonymous
Answered
Greg, Yes unless you get the Elite Combat Executive model the barrel thread pitch is metric. Threaded Barrel designed by Salient Arms International. Fluted and nitride-coated with a 13.5 x 1mm pitch (Combat Executive – 1/2 x 28 inch). ... TP9 Elite Combat