No, they are different calibers. A Glock 17 is 9mm and a Glock 23 is .40 S&W. A Glock 22 magazine would fit in a Glock 23.
No, Thats because a Glock 15 does not exist.
Yes, a Glock 19 9mm magazine can be used on a Glock 23 since both firearms are chambered in 9mm.
Yes, unless you have swapped the magazine release button to the right side (for left-handed use). Gen3 magazines do not have the notch for a reversed mag release. G17 magazines can be generally used in all 9mm Glock models.
It can use both G22 and G23 magazines.
The Glock 18 machine pistol is typically used with a 33-round detachable box magazine. However, the 17-round magazine that sits flush with the butt of the grip from a Glock 17 can also be used.
Yes
You cannot just swamp them out no.
None!
Glock Automatic Pistol. It's used in reference to the .45 GAP cartridge developed by Glock.
300 or so
The advantage to a Glock 18 is the fact that it is fully automatic. However, the advantage offered by the full auto feature can be very easily diminished by its tendency towards muzzle climb, and its excessively high rate of fire, which can dump out a magazine much too quickly for all but the most niche role applications.