the items are recipies from diffrent lines. so if you're a gunslinger i would reccomend getting the toxic needle line. they have a frozen troika line to and a fire diffrent ones such as shockburst brandish and other "shock" items. all require one of the original items to make. so if you don't like crafting then this would be considered "dumb" to you.(or you could a blast bomb helmet if all else fails)
hope this helped :)