Complex sentence: It can be chambered in either 9 × 19mm Parabellum,.45 ACP,.40 S&W (using Glock 22 magazines), 9 × 21mm, 10mm Auto (using Glock 20 magazines), or.357 SIG (using Glock 31 magazines).
Split into simpler sentences: It can be chambered in either 9 × 19mm Parabellum or.45 ACP. They can be chambered in either 9 × 19mm Parabellum,.45 ACP,.40 S&W (using Glock 22 magazines), 9 × 21mm, 10mm Auto (using Glock 20 magazines), or.357 SIG (using Glock 31 magazines).