i dont know what the other guy was talking about, these mags are great! on a regular day you should get 3 full clips in one charge of gas. iv'e gotten up to 4. yea some parts are plastic but don't use it as a hammer and you will be fine. i have not a leaking problem yet either. just maintain it well you the mag will last as long as you do!
-nice weight (not to much not to little)
-not bad on price compared to other gbb mags
-loading can be tricky because the thing doesn't lock anywhere
-few plastic parts (haven't had a problem with that yet)
Rating: [5 of 5 Stars!]