(the 4B is a work in progress.)
This concept is obviously meant for high (over) powered blasters. It operates just like any other hopper in that the ranges and power decline as the hopper empties.
It does misfire once in a while but with a flick of the wrist, the darts realign themselves and it's ready to go. I've fired off the entire hopper many times and I get 2 or 3 misfires per hopper. Not bad in my opinion.
The great thing about this concept, other than the dart capacity, is reloading the hopper is very simple. The back end simply twists off, you grab your darts and shove them in. You don't have to load one at a time. You don't even have to look. Once you close it back up, shake it around once or twice to align the darts, prime and fire.
I've tried this concept with other similar baby bottles but found that this particular bottle design the most reliable.
Thank you Dollar Store.
...In case you wanted to know, my 4B, with this set up still gets 100' by the last dart.