In the game Contra, what does the capsule with an S on it represent?

Contra is a video game which is related to run and gun action game. it is released on 20 February, 1987 and its developers are Konami.

The capsule with S, in the contra game is the spread gun. It works greatly to the player’s advantage and it is a staple of the Contra game series. It works like a shoot gun and is able to hit multiple targets at a time.