This was a good mag while it lasted. Mine broke after about two weeks, on the gear that feeds the BBs into the gun, the teeth wore down and would feed 7 or 8 BBs then you'd hear it completely unwind and you'd have to rewind it for another 7 or 8 shots. Also when I first got it the whole clip only needed one wind.
Holds 300rds compared to the 68rds clips that come with the P90.
Clip usually only needs one wind.
Must take out clip to wind it.