This device is a highly effective and smart platform for your TAG-ML36 grenade launcher. The purpose of this chassis is not only to make the TAG-ML36 independent of your primary weapon, but also to extend aiming possibilities by adding a red-dot, optical scope or any other special aiming device on multiple 20mm "Picattiny" rails. 
 
*ML-36 must be purchased separate.  Picture with ML-36 is to show how Chassis looks installed.