These magazines worked fantastically for a long time for me. I put over 10,000 BBs though them without failure. They don't need to be shot with silicon before they feed flawlessly, and they are very solid for being plastic. Now, that being said, they do not work with bio bbs. I played constantly with non-bio bbs in my CQB arena without any problems, but the second I loaded these with bios, they started to misfeed very badly. This can be solved with silicon spray, but they never feed as well with bios as they do with standard ammo.
feed very well
last a long time
jam without lube when using bio bbs
Rating: [4 of 5 Stars!]