Like many others, I've been wishing for an extended magazine for my P3-AT ever since I traded in my P32 earlier this year. I had the KT 10-rounder for the P32, and carried it every day in my backup mag holder, when I was pocket-carrying the P32 (summertime, deep-concealment). The same leather mag holster, which I think was intended for Walther mags, held the 10-rnd .32 mag or the extra mag for my FEG SMC-918 with finger rest. But at the time I got the P3-AT, no extended magazine was readily available. At a local gun show last weekend, I discovered a magazine seller with 10 and 15-rnd ProMags for the P3-AT. I've had my issues with ProMags before, but I couldn't pass this up, so I bought the 10-rounder, knowing the 15-rounder would never fit in my mag holster and might be less reliable. I haven't had a chance to range-test the new magazine yet, but my extensive manual-cycling tests have all been positive. I plan on loading the extended backup mag with FMJ's. (My primary mag is loaded with Golden Sabres). One thing, the extended mag came with a finger rest, which is totally pointless, since when the mag is inserted the floorplate is far below the hand. So naturally I switched out the floorplates, placing the finger rest plate on one of my 6-rnd standard mags, and a stock flat Kel-Tec floorplate in the extended mag. I like it, although I'm sure the Kel-Tec finger rest floorplate would fit better; there is about a 1/8" gap to the bottom of the mag well when the standard mag with ProMag finger rest is installed in the pistol (see pic #1), but nevertheless it feels great in my hand. The finger rest slips perfectly and naturally between my ring and little fingers, and the pistol feels much more stable in my hand, see pic #2: Standard Mag with ProMag floorplate: Standard Mag in hand: Extended Mag with stock Kel-Tec Floorplate inserted, this mag came with the finger rest, which is obviously completely pointless. Extended Mag with stock Kel-Tec Floorplate in mag holster: Has anyone else tried these new Promags yet? Did yours come with the finger rest? Did you see the obvious like I did (pic #3), and remove the finger rest from the long extended mag? I hope to get to the range in the next week to test out the extended magazine, has anyone else had the opportunity to test one? Just like with the P32, it just makes sense to me to carry an extended mag in the spare position, where there is plenty of room and you have that much extra ammo available, while the standard mag maintains the size and concealability of the pistol in the pocket. Besides, my spare magazine holster is too big for my extra standard 6-rnd P3-AT mag, so it works out all around.