The Cocking Only mag base will have one gear, as that is all that is needed for standard PCPs.
MEA All-N-On Mag for Marauder/Umarex, .First of its kind With the use of interchangeable lids, the All-N-One High Capacity Mag will work up to 21 different platforms and counting. There are two kinds of ALL-N-One Mag bases for Semi Auto PCPs and Cocking only. All you need to get started is to buy the mag you need, and if you have additional rifles, then purchase the appropriate lids.