JK Armament Minimalist Black. 2 ounces and is a scant 1.0 inch long. It provides secure rapid attachment and removal of the JK 155 suppressors and any other suppressor with an ASR-compatible mount such as one of the Taper Mounts. Precision machined from heat-treated and black nitride 17-4 stainless steel the JK HD Minimalist is available in 1/2-28 (For use with .22 Cal & 9mm) and 5/824 (For use with .30cal and .45cal). Specifications for JK Armament Minimalist: Manufacturer: JK Armament Caliber: .45 ACP Fabric/Material: Stainless Steel Color: Black Finish: Nitride Threads per Inch: 11/16x24 Length: 1 in Weight: 2.2 oz Package Contents: JK Armament Minimalist JK Armament JKMDHDM111624: Minimalist 11/16x24 Black