BudsGunShop.com - barrel

No. Instead of using a normal thread pitch, SIG SAUER in their typical SIG SAUER way decided to use a 13.5×1 metric left hand thread pitch for their barrels.

13.5×1 metric left hand thread pitch

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Hi Paul, No. typical SIG SAUER uses a 13.5×1 metric left hand thread pitch.

13.5×1 metric left hand thread pitch