Good product - Yankee Hill 4400 SRx QD Adapter 1 3/8x24 TPI 17-4 Stainless Steel

Like somebody else mentioned, the product label is a bit confusing as this item isn't specific to 9mm. This is YHMs SRx QD adapter that will mount up to any of their, or any other brands, standard hub 1.375x24 compatible silencer.

The product threads to the silencer as expected and mounts up to my SRx short muzzle brake without issue. I still need to put more rounds through the combo but I don't expect any issues since the SRx system uses the taper mount system that seems so reliable these days.