I have the only one in the thread...
My favorite 9mm is my Astra 600.
Forwhy is primarily because it's the ONLY 9 x 19 I've got.
BUT...
It has a fixed barrel. and is therefore VERY accurate. One of the most accurate autos I own. I like to shoot it at 100 yards. I can harrass a 2-litre bottle right well at that range.
It has some very strange lines, and I really like odd-looking guns.
Very solid and durable. Nice trigger. 100% reliable. (With ball, that is.)
Practice ammo's cheap. Fun plinker.
Smooth exterior. Pockets well, for a full-size pistol.
Grooved, tubular-configuration slide, combined with a very steep grip angle a lot like a CZ-52, makes this gun an EXCELLENT point shooter. Held in one hand and extended far enough out to see in your peripheral vision, the lines and shape of the slide give an exceptional visual reference to where the gun points without requiring the sights. I can get about 7 out of 8 on an empty oil jug at forty or fifty feet with surprising regularity.
Cheap for what it is, a full-size/power service gun originally ordered by the Nazis after their exposure to the Astra 400, most were never delivered. Good examples sell for under $200, usually, with fine bores and minimal wear.
Lots of dis-advantages, though. Blow-back action in a full power 9mm makes for a recoil spring that would do justice to a garage door. It also has a stout hammer spring. This makes racking the slide REALLY tough. I can't do it with a pinch grip without squeezing hard enough to hurt. I usually have to grasp the top of the slide from above to get enough grip/leverage.
The mag release is a Euro-heel clip that's been turned 90 degrees. You press on the SIDE of the grip to remove the mag. Odd.
The grip angle is not conducive to two-handed shooting. Many of my friends have a tendency to shoot the ground 20 feet in front of themselves when aiming at a dirtbank 40 yards away. Shoot it one-handed, after you get used to it, and you're home free.
Heavy for caliber. The slide's a full quarter-inch thick for two-thirds of it's length. Can you say robust?
Difficult take-down for fieldstripping. Get a .50 A.E. empty case to depress the front collar, and it's not so bad.
Parts are mail-order specials.
Shoot 200 rounds through it in a day, and it'll make your hand tingle. Sharp blow-back recoil, you see. Stopping that heavy slide against the frame is a substantial whack. It'll tire you out, too.
Odd features, not neccesarily bad, are a magazine safety and a grip safety in addition to the manual safety. It's a hammered hammerless, like a Colt 1903. It's got a lanyard loop, and it's held together with these odd pins that are "L"-shaped. Very strange appearance. Most people think it's ugly, and call it "the Plumbers Nightmare". I regard it as character.
I think it's an ugly duckling and highly under-rated. These things are BUILT, being made entirely from milled parts. The Count of Campo-Giro had a good thing going when he designed this gun. I suspect they would be too expensive to produce these days, much like John Browning's Model 8/81 Remington long-action self-loading rifle.I'm going to get a 400 as soon as I find one at a good price. 9mm Largo in a blow-back action ought to make it fun to shoot, also.