1. Dublin. Cannot find a CM030 in stock anywhere. EbairSoft Airsoft parts & Tactical Gear - CYMA DE CM121 AEP CM121. Found this, a bit bigger than the 030, but something along the lines all the same. hairyman, Dec 23, 2010. Dec 23, 2010 #12. This fits your . Make sure this fits by entering your model number. Airsoft magazine for CYMA CM030 AEP. Solid metal construction and brand new in package. Standard capacity of 30 rounds. Loaded spring type TM compatible. SportPro CYMA 27 Round Metal Low Capacity Magazine for AEP CM121 DE.50 Airsoft - Black. 2.4 out of 5 stars.