We would like you to assess the QUALITY of each of the following argument (discussing Gun Control) and determine if the argument is Valid or Invalid. A valid argument is clearly interpretable and either expresses an argument, or a premise or a conclusion that can be used in an argument for the topic of gun control. An invalid argument is a phrase that cannot be interpreted as an argument or not on the topic of gun control.

It is not the legal gun doing the crime it is the illegaly owned guns, so if you take my guns the criminals have no one to stop them since they have guns we don't.
Valid

Guns don't kill people, people kill people: absolutely true, but guns allow people to kill people with greater efficiency, which is not necessarily a good thing outside of the battlefield.
Valid

First you argued that the Second Amendment was a collective rights tool designed to ensure that each state had its own private militia.

Valid