They fit fine in my JG before and after modding. Overall i highly recommend these mags because they are cheap and I can unload a whole mag at 22rps without a single mis-feed. I 100% recommend these if you are looking for good midcap magazines for your G36.
These mags are great I just got 2 of them yesterday and they hold between 125-135 BB’s but you will have to load and unload them 3 or 4 times before they hold that much and I haven’t had any misfeeds in the few thousand shoots I’ve taken with them.