The Improved Arc Thrower is a more potent version of the Arc Thrower used to capture live Alien specimens. It has a higher chance of capturing the target and better range.
XCOM Enemy Unknown: Improved Arc Thrower
From Orcz
The Improved Arc Thrower is a more potent version of the Arc Thrower used to capture live Alien specimens. It has a higher chance of capturing the target and better range.