The Metallic pushbutton for the Qanba Gravity KS Line is here.  KS is short for Snap-In, Short Throw. 

This is a snap-in type pushbutton that allows the user to configure it with various parts to achieve a different feel and performance. 

KS Line Features

• Omron Linear Switch (Tactile Option)
• Short Throw 2.8mm
• Faster Engage
• Silicone Inner Cap for Quieter Performance
• Clear Cap for Artwork Insert
• Optional Silicone Silencer Pad for further noise reduction

Quick Link:  http://tinyurl.com/QanbaKS30METALLIC