I would opt for more bullets. I did think the flar bullets are kind of cool. I was waitin for him to pull a tent out of that gun at some point lol. a knife,lighter, bunch of bullets and antibiotics and ur set to go. if I were to add something to that gun it would be some sort of water purification system. maybe some loose activated charcol you stuff in the barrel and run the water throuh it makeing it clean when it comes out the other side lol