People like to rave about these BBs and speak of them as if they came from heaven. Maybe because the bag says that they are "Perfect". But don't believe everything you see. These BBs are not perfect, despite what the bag reads.
They are definitely not bad. They have a very slick finish and I haven't encountered a single misfire while using them.
However, they show visible casting ridges and injection nipples. They also shatter upon impact when fired at hard surfaces - which is cool, but other BBs simply crack or dent. Shattering BBs can be dangerous.
Most importantly for me, my AEG just doesn't seem to like KSC Perfect BBs. They follow a curved flight path and often hit to the left of where I aim where TSD Tactical BBs don't seem to have the same problem.
I have actually heard elsewhere that these are better for use with Gas pistols.
Very slick, smooth finish. No jams or misfires yet. These are definitely on the higher end of the BB quality spectrum.
Visible imperfections. Performance is simply not great in my AEG.
I would recommend TSD Tactical BBs, which are also less expensive.
Rating: [3 of 5 Stars!]