The Mechanical Arm is an alien weapon which presumably your arm fits into. It fires bolts of energy and has a high rate of fire. Appears to take care of even the high end bad guys with no trouble. 

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.