Type in "Weapon Shops" and Google autocompletes with "Of Isher." That's an influential work. Wikipedia:
The Isher/Weapon Shops novels are very rare examples of Golden Age science fiction that explicitly discuss the right to keep and bear arms, specifically guns. Indeed, the motto of the Weapon Shops, repeated several times, is "The right to buy weapons is the right to be free". Van Vogt's guns have virtually magical properties, and can only be used in self-defense.
But apparently if you don't want to shoot someone, you can beat him to death with the butt.
The Slans, by the way, "possess near limitless stamina, 'nerves of steel,' and superior strength and speed. When Slans are ill or seriously injured, they go into a healing trance automatically." So they're Call of Duty players.