Looking for a powerful and accurate handgun? Look no further than the Glock 21 Gen4. The 45 Auto round delivers enormous power, while the Modular Back Strap system makes it easy to customize the grip to fit any hand size. Plus, the reversible magazine catch means it’s perfect for left- and right-handed shooters. So if you’re looking for an ideal companion for the 45 Auto caliber cartridge, look no further than the Glock 21 Gen4.