Shoulder weapons are the "cavalry" of the Macrophage Arsenal - The Chain-Gun fires very large munition at extremely rapid rates of fire. Unlike the traditional machine gun which is designed to clear groups of small unarmored enemies, the Shoulder mounted Chain-Gun rounds are armor piercing and can be used to quickly clear groups of heavy enemies. Despite being an extremely effective offensive weapon, it's limited ammo reserves demand it be deployed sparingly -
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This weapon is HEAVILY inspired off of the "Chain-Gun" weapon archetype from the Armored Core series. I've always loved the look and feel of this kind of weapon, and ever since the first one I found in AC, I've never gone into battle without one - There were many ideas and variants for this kind of weapon I considered before deciding on this design, but in the end I wanted the weapon to look more "realistic" than "sci-fi" - And, thus, I voted to keep the look very traditional to stay true to the simple classic aesthetic.