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

Now in 24mm for those all-button controllers.

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 Switch Optional)
• 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