KWA MS120C Variable Capacity 30 / 120 Round Magazines for KWA ERG / AEG2.5 / AEG3 Rifles (Qty: 3 Pack)

"I use these mags for the KWA Ronin T10 and they work great! Just make sure to change the switch from 30 to 120 before you start loading BBs and you're good to go.

"If you want to use these in a Ronin T6 you need to put a .8mm shim between the floorplate and the internals of the mag. If you don't you'll have to push up on the mag to get it to feed. I've talked to KWA about this and they say these are only compatible with guns that have last round cutoff. Once you shim them they work fine in AEG2.5s, but not well at all in my Arcturus AR03.

"Not sure if they just aren’t meant for the older Ronin series or not but I got one for my R6. While it did FIT it didn’t FEED unless I put some tape around the mag itself or pushed from the bottom into the gun. So as a warning for those who want to use these in (at least) the Ronin 6, it will not feed without modification of some sort

"Bought these for my VM4 that I had built by Black Swan Dynamics. The externals of these mags don’t fit inside the receiver properly. Unlike the pmags, k120s, and other mags for the erg/2.5s these need to be held in and pushed up to feed. Other than that the internals are good to go, wound up swapping them with my pmag internals.