GLOCK G40 GEN4 MOS 10MM AUTO
Handloader|October - November 2020
FROM THE HIP
Brian Pearce

In 1980, the Austrian Armed Forces announced it was searching for a new sidearm for military use and outlined a rather lengthy criteria list. Gaston Glock had no experience at designing firearms; however, he did have extensive experience with synthetic polymers and engineering. He assembled a team of European handgun experts to help in working out design features and details of the new pistol. His first gun was the Glock 17, which was the first commercially successful handgun to feature a polymer frame.

In spite of great skepticism from many sources to the effect that a pistol with a synthetic frame “could not possibly withstand the stresses necessary for endurance,” the Glock 17 proved durable and reliable. After extensive testing, the Glock 17 was adopted in 1982 by the Austrian Army and police. In the decades since, Glock has introduced more than 170 variations of the original design, chambered from .22 Long Rifle to .45 ACP. Glock pistols have gained huge worldwide popularity with countless military and police organizations, but also civilians that use them for recreation, competition, personal protection, etc. To date, around 10 million guns have been sold.

For this column, I selected the G40 Gen4 MOS chambered in 10mm Auto, which is built on the large frame and is Glock’s largest pistol. As such, it is probably not ideal for all shooters, especially those with smaller hands. It does offer a four-piece modular backstrap that allows the shooter to change the feel and size of the grip frame, but does not permit making it smaller than its original form. Other features include a 6.02-inch barrel and 15-round magazine capacity (with two extra magazines included). The flat black slide is gas nitride treated, which has proven rust resistant, tough and durable. And it has the familiar “safe action” that is a constant operating system that includes a trigger safety (with protected pivoting center), firing pin safety and drop safety. Like most out-of-the-box Glock pistols, trigger pull was heavy, even heavier than most others, at 6.5 pounds. For lefthanded shooters, the magazine catch is reversible. In spite of its size, it weighs 35.45 ounces empty (with magazine installed).

The G40 includes the Glock Modular Optic System (MOS) adapter set that offers four additional options (plus the factory installed plate) for mounting reflex sights and other accessories. The MOS mounts just forward of the rear sight on the top of the frame and is flush with the contours of the slide. This pistol is probably going to be pressed into action mostly by outdoorsman and hunters, and reflex sights are already becoming more reliable, practical and popular, which is certain to make the MOS even more appealing.

Continue reading your story on the app

Continue reading your story in the magazine