The defining feature about this magazine is the flash winding system. Once you get used to opening the bottom plate and fumbling around for the tab you pull on, you'll be winding up your magazine in a "flash". It's decent quality, made of metal with a nice finish, and feeds well.
As a side note, it's actually longer than a standard magazine, but shorter than 500rd extended ones.
Metal with good finish
A little hard to get used to
Doesn't fit the G&P metal receiver I have
Rating: [5 of 5 Stars!]