.40 S&W with JACKETED bullets. The polygonal rifling in a Glock does not mix well with lead bullets.
yes
Caliber is .45 GAP (Glock auto pistol)
The KJW Glock 23 only can use KJW Glock 23 magazines. You can buy these from amazon.com for 15 dollars.
The glock 21 fires the .45 automatic colt pistol (.45acp, or .45 auto) round.
Federal premium ammo
Yes, a Glock 19 9mm magazine can be used on a Glock 23 since both firearms are chambered in 9mm.
No - they are very different cartridges.
Different calibers. The Model 19 is in caliber 9x19mm, the Model 23 is a .40 caliber. The 19 holds more ammo in the standard magazine. External dimensions and weight are the same.
Speer Lawman is good range ammo. It'll cycle through a Glock just fine.
9x19mm, also known as 9mm Parabellum or 9mm Luger.
No. Because a Glock 26 is chambered in 9mm, as a Glock 23 is chambered in .40 s&w. For example you can use a Glock 22 (full size) in Glock 23 (compact) and in Glock 27 (sub-compact) But you cannot use Glock 27 mags in Glock 23 or Glock 22.
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.