From the easy grip rubber handle to the over-sized locking screw

The environment that an RK3 is used in will tend to dictate the size of fin that you need

or inserted directly into the WTX Harness

The pneumatically balanced valve provides superior performance for an alternate air source

mtx rc stage 3 dive regulator octopus Colors:Satin Chrome / Grey From the easy grip rubberGo warm, go cold, go deep, go anywhere. Enjoy control in the extreme with the MTX RC scuba diving regulator. Combining rugged, military grade engineering with the super smooth breathing experience that Apeks regulators are renowned for, the MTX RC is the regulator that lets you explore more.