system
Given the following post, respond as if you're commenting on Reddit:
human
[Mass Effect 3] Why is the M-358 Talon seemingly illegal?

Hi all,
Why is the M-358 Talon seemingly  illegal  according  to a C-SEC officer's  datapad found near where  you pick up the weapon? What was it about the weapon that made it seemingly  illegal?
gpt
It's absurdly powerful for a weapon its size, and is far beyond the needs of any general civilian use. It's clearly a military weapon, meant to punch through military-grade shields and armor, and cause massive havoc to anyone its pointed at. (Most of Shepard's weapons are probably also illegal for a civilian to own) 

Plus with a gun that powerful, it's just asking for a dumb civilian to point it at a ship or station's bulkhead and rip an irreparable hole into space with just one shot. At least military trained personnel are taught where and how to aim, a civilian isn't guaranteed to know how to operate a hand cannon like that. So it's safer to make a blanket judgment on that and probably thousands of other gun models in the galaxy.