These magazines are Okay, and get the job done. I am using these for my Echo1 G36K, and the only problems i am facing with thim is that they don't fit easily into the magazine compartment on my G36K. Compared to the High cap magazine that came with it, these magazines take forever to get to fit inside the mag holder. Once you get past that though, these magazines work fine.
mid cap (2)
no clogging (until last maybe 10 round)
hard to fit in Echo1 G36 mag holder
can spray at times
Rating: [4 of 5 Stars!]