You can find the Griffin 9mm 3 Lug Interface For Revolution/Optimus/Resistance Suppressors here.

The Griffin Armament 9mm 3 lug interface assembly is a 3 lug assembly which adds minimal length to the suppressor. This kit allows for QD mounting of many Griffin suppressors. Griffin's 3 lug adapter requires minimal deflection of the spring bushing for installation in some cases negating the need to modify hand stops and grips that come close to the 3 lug adapter. The 9mm kit fits HK standard 9mm 3 lug adapters as well as Griffin 3 Lug Adapters. US made Barrels from RCM and Michael's Machines comply with these dimensions as well as German HK brand barrels.

Caliber: 9mm (Resistance 9/45, Revolution 9/45, Optimus 9, Micro, Bushwacker .46)