Possible mild spoilers to follow:
So, is there any way for him to survive if you don't give him a gun? Like, if I take out all the enemies in the area before leaving? Or will he always hold a grudge? All I have is a heavily upgraded pistol that I'm unwilling to part with. Have a tranq and stun gun that are my mains as I'm going through a pacifist playthrough as much as I can - pistol is there for the boss fights. Will I get it back later if I give it to him? Anyone tried?