Supermarine

"The LMG of the Shotlite range, the Supermarine really brings "Light" to Light Machine Gun. At 3.6 kg fully loaded with its large ammo drum this has to be hefted to be believed"  - Official description

Overview
The Supermarine is a very strong, versatile gun due to the fairly small movement penalty, high rate of fire, above average-damage, huge clip, 3 pierce all together make a versatile gun capable to take down most zombies and bosses, including Devastators if the user has a speed boost from skill points or armor. However, the reload time is quite long, but can be worked around a little by firing conservatively and reloading when no zombies are around.

Trivia

 * Its name may be reference to series of fighters produced by Supermarine
 * Despite the description saying 200 rounds in clip, it's actually 180 rounds in game; the number was most likely rounded.
 * The Supermarine, unlike other Shotlite weapons, is not named after an airplane. Rather it is named after the company that made the spitfire, an infamous world war II fighter plane.