Angle grinder works wonders.
Seriously.. yes, it can be removed. Remove small allen button head bolt. Turn trigger over. Remove the "fuk me" clip carefully, hold trigger in place, carefully remove pin, then remove side bolt release. Re-insert pin, the "fuk me" clip, and screw the button head bolt in.
Good to go.
Its called a "fuk me" clip, because if it launches off into space without you seeing where it goes.. thats exactly what you will say. Pro-tip: rotate the trigger so the clip is remove away from you. Insert the trigger into a clear plastic bag. Remove and try to have your finger touching it so it doesnt fly, but if it gets away from you, its hopefully still in the plastic bag.