Laylax shows you how to install the First Factory Tokyo Marui MP5 Kurz SAS Silencer Attachment NEO. This allows you to install a suppressor that requires a 14mm CCW thread. This will fit the Tokyo Marui MP5KA4 AEG and the Tokyo Marui Gun MP5KA4 AEG but not the Tokyo Marui High Cycle Custom MP5K AEG.