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Glock G45 MOS Review: Combining the Best of What Glock Guns Offer?

Glock G45 MOS Review
Image: Creative Commons.

Though the G45 MOS is a mish-mash of several pistol types, it is a powerful — and compact pistol.

Why People Love Glock 

Glock offers quite a few pistols in long slide, standard, compact, and subcompact sizes — and their compact offerings, in particular, stand out. These pistols are small and lightweight and optimized for hidden, concealed carry. 

Indeed, compact pistols don’t always offer the same magazine capacity as Glock’s other larger, standard-sized pistols, nor quite the same amount of firepower as more powerful calibers; they’re still some of the best compact options on the market today.

 G45 MOS, Explained:

One offering that is particularly noteworthy is Glock’s G45 MOS. The pistol combines a compact all-metal slide with a full-sized frame “and has all the benefits of a Gen5 model.”

The Glock’s mos designation means that it is a breeze to mount optics directly onto the slide itself without needing another slide or complex mounting equipment — simply unscrew the optics mounting plate and install your sight system. The pistol can also mount a flashlight underneath the barrel, thanks to a mounting point.

It is worth mentioning, too, that the G45mos is chambered in 9x19mm. Although 9x19mm is by no means the most powerful handgun cartridge on the market, it’s not a bad choice considering the pistol’s magazine options. In addition to a standard 17-round magazine, the G45mos can accommodate increased capacity magazines, including 19, 24, 31, and an almost absurdly large 33-round magazine.

Gen 5

The heart of the G45 MOS is Glock’s Marksman barrel, part of the Gen 5 Glocks that the Austrian company says features “enhanced barrel rifling based on the proven polygonal barrel design which delivers improved accuracy.” Glock is known for its proprietary barrel design, which provides a better seal between the bullet and barrel, allowing less propellant gas leakage and minor bullet deformation. Glock claims that this translates into more extended pistol longevity as well as better accuracy overall. In the case of the G45mos, the barrel is 102mm or 4.02 inches long.

Another Gen 5 improvement is the pistol slide’s front serrations. Previous models featured serrations only on the rear of the slide, and this newer, more tactile surface offers better handling even with wet or dirty hands and gloves. The slide is also slightly wider at the end, which provides better pull ergonomics. Lastly, Glock treats the slide with the company’s nDLC surface treatment, essentially a non-reflective and scratch and corrosion-resistant coating.

Gen 5 pistols, including the G45 MOS, eliminated Glock’s previous grip with finger grooves and features redesigned checkering for a better grip for a wider variety of hand shapes and sizes.

Postscript

Although the G45 MOS Black is a mixture of several Glock pistols frame and slide types, the pistol can leverage the best from both worlds and offer good magazine capacity and, of course, Glock’s reputation for quality, accuracy, and longevity.

Caleb Larson is a multimedia journalist and Defense Writer. He lives in Berlin and covers the intersection of conflict, security, and technology, focusing on American foreign policy, European security, and German society.

Written By

Caleb Larson, a defense journalist based in Europe and holds a Master of Public Policy degree from the Willy Brandt School of Public Policy. He lives in Berlin and writes on U.S. and Russian foreign and defense policy, German politics and culture.

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