I bought these nerf rival refills for my nephew's nerf rival guns that they received for Christmas. Being boys they are constantly losing things, especially if those things can fly across the room. The have lost nearly all of their nerf rival ammo and I was really hoping these would work for them. While they do fit into the guns and they do shoot they just aren't as good as the original nerf brand. Compared to the nerf rival bullets they seem to be a little different. They definitely weigh less than the original nerf rival bullets. They are the same size though because they do fit in the gun. But they outside of the ball is different a well. The dimpling on the outside is different than the nerf rival but I am not sure if that makes a different or not. The original nerf rival bullets shoot a pretty decent distance but these lighter ones don't shoot quite as far. They don't seem to be as accurate either. They spin off to one side or the other.
My nephews don't seem to mind the shortfalls of these new bullets at all. All they know is that they don't have to search the entire house for the lost bullets. At least they don't have to do it yet since this is a 100 back. Overall I feel like these are perfect for my nephews who are 8 and 6 years old. But I feel like if they were much older they might not like them very much at all. I gave them three stars because my nephews really do like them despite what I found wrong with them. I bought this product at a discount price in return for an honest review.