Night-Viper (version 5) was released in "Night Marksmen" set as part of the first wave of 50th Anniversary figures in 2014. The set also included Low-Light (v8).
This loose incomplete figure and accessory comes exactly as shown.
Night-Viper is missing the following items - Machete & Satchel
WARNING: CHOKING HAZARD-Small parts. Not for children under 3 years.