It seemed like a good idea at the time...
Some things are tried and proven. There are other things that have been tried and found to be better off forgotten.
Scopes or red dots sights are one of the ideas best forgotten. I don't sell them. But players manage to find them, mount them and within a week or two take them off (or they get knocked off). They soon enough discover there is no time to use them and that no two paintballs are alike. They never go in the same place twice let alone hit the crosshairs. Not to mention focusing through a scope takes your attention away from the guy flanking you.
Long barrels are another. After finding out they do not improve range, and after smacking and banging them against the side of bunkers they usually find their way to the bottom of equipment bags. (I once watched a player with a long barrel pole vault himself into a bunker - true story.)
The Q-loader system...if you don't know what it is I'm not going to burden you. If you do know, well... then you know.
CO2 tank covers. Twist on and twist off the tank while fighting the spinning cover about a dozen times and it usually gets tossed.
Chest protectors? Hot, heavy security blankets that soon get out grown.
Mask fans? They don't usually last longer than the second set of batteries. To loud.
Remotes? Ten pod packs? Three hundred round hoppers? Seventy five dollar speedball jerseys? Goggleflauge?
You get the idea. Maybe.