I was just wondering what are the differences between 40mm types (not name brands)
like this one
and ones like this
I have one right now that is similar to the first one shown. But the BBs roll out a little bit, I have read up a little bit about that and seen people say good ones will have a better 0-ring or something to keep them put. I ask because I wouldnt mind buying replacement plugs for the bottom ones shown, but I dont know if those types of grenades are even any good, or better than the top ones.
(sorry if thats a little confusing)