While there are many uses for firearms such as target shooting, competition, hunting, and recreation the primary usage is for killing. If this were not so then there would be no need for the second amendment.
I think as a gun owning American you need to be OK with this. The anti's will always use the argument that guns are for killing. I think if we agree we take their biggest argument away from them. While it is used by scum fuck criminals to kill innocent people it is necessary for citizens to be able to have the ability to utilize deadly force as a deterrent or to give them a chance against said criminals. This same deterrent is also necessary to make sure the government never oversteps it's bound and the people have no means to stand up to their tyranny.
Freedom is not something guaranteed by God, King, or Law. Freedom is something good people must provide for themselves by proficiency at arms.