Here's a video of made by 6 Precision of the Concept Tactical T.R.M.R. Impact Sound Device from RWA... "This Tactical Reloadable Maritime Ready ( T.R.M.R. ) Sound Device is an ergonomically designed multi-use grenade that utilises a twist to arm inertia recoil firing system, this allow for safe, fast reloading of the device without the need of levers and pins as used on conventional hand deploys devices.