[BUBBL3]

As the name implies, it is a bubble shield. Small and compact, only covers the wearer. Allows projectiles to fire outwards but blocks them from going in. Lasts either two minutes or depending on the intensity of the hits until it shatters.

Has a one minute cool down and slows down the making of ammo considerably.
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Best thing I can think of aside from a set of heavy armor, and that's not really techy so..