The 3 lug interface assembly is an integral 3 lug assembly which adds minimal length to the suppressor. This kit allows for QD mounting of many Griffin suppressors. To view applicable calibers and ratings see individual suppressor product pages. Our 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 10mm/40S&W kit is made for Mp5 10mm or 40S&W barrels that comply with the HK dimensioned 3 lug. Additionally, this interface is designed to work with our .45ACP 3 Lug mounts available in 5/8x24, .578x28, and 16X1LH (KRISS compatible).