Aeroknox Plus 5 Mag Extension

Honestly seems and feels like it could be a great mag extension and I was about to put it on my PMAG and then I realized I had no way of taking it off If it didn't work properly, maybe I'm just being blind but it seems to me once you slide it on and the spring and end detent of the magazine pop into it, since there is no hole on the back, it is impossible to remove it

Got this in my Tac-pac subscription box in Aug of 2022, I placed it on my 10 round magazine. Had to remove the bottom plastic on the mag spring to have the full +5 so if you have trouble getting that last round in there try that.
My 10 round magazine was also a gen 3 for the record.