The folks from www.glockcarbine.com were at "Knob Creek" this past weekend. I picked up one of the MAGLULA's www.ar15.com/forums/topic.html?id=105361 from them.
I tried the device on several types of mags.
Worked real well on my USGI (20 and 30 rounders) and 30 round Thermolds.
I tried it on some recently purchased "Brand New", Master Mold 20 rounders and I experienced some difficulty, during the unload. This could be due to the fact, that I haven't taken the time to remove the plastic flashing from these mags yet.
All-in-All, I like the loader/unloader, it does it's job very efficently and worth the money spent.
Those individuals that have their ammo loose, will find this to be a a great little device to have around.
(BTW, I expect the product endorsement checks to come rolling in any day now! Can't wait to be rich )
Denny, will you be at the BRC?