Never had any mags but Glock. and
yes not having last shot hold open is a big problem, it's a magazine defect if it doesn't do it with a Glock mag.
The problem being, every time you do an "in battery" reload, (the gun is closed) now you have to cycle the side by hand, to make
sure that you have one under the firing pin.
With the last shot open feature, you ave a visual clue that the gun is dry. My habit and practice, is that if you have a lull in the action during a gun fight,
and you can think that clearly :eek: , reload, save your partial mag, and cycle the action to be
darn sure one is back under the hammer. 'Click!' stinks.