Works great with faxon compensator - Faxon Firearms Duty Series Smith & Wesson M&P Shield/Shield Plus 3.1 in Threaded Pistol Barrel

I was concerned that this might be too small to work with my Shield Plus to add a compensator as it says it’s 3.1 inches. The overall length is a big longer. The threads start around 3.1. It makes for a perfect fit with compensator.