It has since been mostly decommisioned, and replaced by the StA-54.
The StA-53 has a high fire rate with moderate to high damage. It is most effective at close to medium range. Headshots are 30 damage, torso shots are 20 damage and limb shots are 10 damage, making it a very over-powered weapon.
Design and Features
Based on the StA-52 LAR from Killzone, the StA-53 consists of two barrels. The top barrel is for regular (automatic) fire and the lower barrel, which was originally for the shotgun firing mode before the design was changed to be simpler, and the shotgun feature was no longer available.
The StA-53 has recently been given a new design modelled after the simplistic RCL assault rifle made by BenBonez.