GLOCK G45 GEN5 MOS 4.02″ 9MM 17RD PISTOL W/ EOTECH 3MOA MINI REFLEX SIGHT – PA455E203MOS

The Glock 45 Gen5 MOS Crossover combines a compact slide with a full size frame. Gen5 features flared mag-well has a larger funnel; Glock Marksman Barrel (GMB) more aggressive polygonal rifling with a target-style crown and tighter chamber specs; ambidextrous slide stop levers offer increased ergonomics for left-hand shooters and shooting with the support hand; removal of finger grooves; Safe Action System, safeties disengage sequentially as the trigger is pulled and automatically re-engage when the trigger is released; enlarged floor plate makes it easier to pull the magazine free of the pistol and customizable frame size with backstraps in two sizes with beavertail. The multiple backstrap frame allows the users to change the circumference of the grip to fit their individual hand size. MOS features a slide that is precision machined to provide a mounting system for popular optic sights. With multiple adapter plates (sold separately), you can quickly and easily mount miniature red dot sights. Includes EoTech 3 MOA Mini Reflex sight, one adapter plate, three magazines, mag loader, cleaning kit, pistol case and gun lock.

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GLOCK G45 GEN5 MOS 4.02” 9MM 17RD PISTOL W/ EOTECH 3MOA MINI REFLEX SIGHT – PA455E203MOS

The GLOCK G45 Gen5 MOS 4.02” 9mm 17RD Pistol w/ EOTECH 3MOA Mini Reflex Sight (PA455E203MOS) is a groundbreaking combination of compact handling, full-size performance, and advanced optics integration. Designed with precision engineering and user-focused ergonomics, this pistol delivers exceptional reliability, adaptability, and shooting performance—whether you’re a law enforcement professional, competitive shooter, or responsible civilian looking for a dependable defensive firearm. By pairing the proven GLOCK Gen5 platform with the renowned EOTECH EFLX 3MOA Mini Reflex Sight, this package offers fast target acquisition, enhanced accuracy, and modern modular capability that meets the demands of today’s shooters.

This detailed guide covers everything you need to know about the GLOCK G45 Gen5 MOS, including its specifications, design improvements, performance benefits, optics-ready configuration, and why it stands out in the modern pistol market.

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1. Overview of the GLOCK G45 Gen5 MOS

The GLOCK G45 Gen5 MOS represents the best of both worlds, merging the compact slide of the GLOCK 19 with the full-size frame of the GLOCK 17. This crossover design, originally developed for military and law enforcement contracts, provides optimal balance, superior control, and increased magazine capacity without sacrificing maneuverability.

The “MOS” (Modular Optic System) configuration allows shooters to mount a variety of micro red dot sights quickly and securely, while the addition of the EOTECH 3MOA Mini Reflex Sight enhances target acquisition and shooting precision in dynamic scenarios. Together, these features create a pistol that excels in defense, tactical operations, duty carry, and sport shooting.

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2. Key Features and Specifications

Here’s an in-depth look at the technical specifications and core features of the GLOCK G45 Gen5 MOS PA455E203MOS:

• Manufacturer: GLOCK

• Model: G45 Gen5 MOS

• Caliber: 9mm Luger (9x19mm)

• Barrel Length: 4.02 inches

• Overall Length: 7.44 inches

• Height: 5.47 inches

• Width: 1.34 inches

• Weight (unloaded): approx. 24.48 oz

• Magazine Capacity: 17 rounds (compatible with higher-capacity GLOCK 19/17/34 magazines)

• Trigger Pull: ~5.5 lbs (GLOCK Safe Action Trigger System)

• Frame: Full-size Gen5 polymer frame with flared magwell

• Slide Finish: nDLC (nitrided Diamond-Like Carbon coating for enhanced durability)

• Sights: Includes EOTECH EFLX 3MOA Mini Reflex Optic pre-mounted

• Optics-Ready: MOS system with interchangeable adapter plates for various red dot optics

• Front Serrations: Enhanced forward slide serrations for easier manipulation

• Grip Texture: Gen5 aggressive stippling for superior control

• Controls: Ambidextrous slide stop lever; reversible magazine catch

• Barrel Technology: GLOCK Marksman Barrel (GMB) with enhanced polygonal rifling for improved accuracy

• Trigger Safety: Integrated trigger safety plus firing pin and drop safety mechanisms (Safe Action System)

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3. The Gen5 Upgrades That Matter

The Gen5 series introduced several meaningful upgrades over previous GLOCK generations, and the G45 Gen5 MOS benefits from all of them:

a. Glock Marksman Barrel (GMB):

The precision-engineered GMB barrel improves accuracy with tighter tolerances and enhanced polygonal rifling, providing superior shot consistency at longer distances.

b. nDLC Finish:

The durable nDLC coating on the slide and barrel offers increased corrosion resistance, smoother operation, and enhanced wear protection, even in extreme environments.

c. Flared Magwell:

The slightly flared magwell speeds up reloads under stress, making it ideal for law enforcement and tactical applications.

d. Ambidextrous Controls:

The ambidextrous slide stop lever and reversible magazine release cater to both left- and right-handed shooters.

e. Front Serrations (FS):

Forward slide serrations provide better grip during press checks and manipulations, especially when optics are mounted.

f. No Finger Grooves:

The Gen5 grip eliminates finger grooves for a universally comfortable hold, allowing shooters with different hand sizes to achieve a more natural grip.

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4. Optics-Ready MOS Platform

The MOS (Modular Optic System) platform revolutionizes GLOCK pistols by allowing seamless integration with popular micro red dot sights. The G45 Gen5 MOS includes multiple mounting plates, enabling compatibility with top-tier optics such as:

• Trijicon RMR and SRO

• Leupold DeltaPoint Pro

• Holosun 507C/508T

• EOTECH EFLX (included in this package)

The ability to co-witness with suppressor-height iron sights ensures redundancy in case of optic failure—a crucial feature for defensive or duty use.

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5. EOTECH EFLX 3MOA Mini Reflex Sight

This package includes the EOTECH EFLX Mini Reflex Sight (3MOA red dot), a premium optic known for its clarity, ruggedness, and rapid target acquisition.

Key features of the EOTECH EFLX:

• Dot Size: 3 MOA for precision shooting and versatility

• Brightness Settings: Multiple settings optimized for day/night use

• Battery Life: Approx. 20,000+ hours with CR2032 battery

• Durability: Waterproof, shock-resistant, and built for extreme conditions

• Optic Window: Large lens with minimal parallax for fast, accurate sighting

This combination provides an out-of-the-box, optics-ready solution—perfect for those wanting cutting-edge sight technology without aftermarket installation.

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6. Performance and Accuracy

The GLOCK G45 Gen5 MOS w/ EOTECH is engineered for outstanding accuracy, speed, and control:

• The GMB barrel enhances precision and tighter groupings.

• The full-size frame stabilizes recoil, while the compact slide quickens cycling time.

• The EOTECH reflex sight drastically reduces sight alignment time, improving speed in dynamic or defensive shooting.

• Ergonomic grip texture ensures confident handling, even in wet or gloved conditions.

Whether at the range, in competition, or in a defensive scenario, this pistol consistently delivers reliable, repeatable results.

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7. Reliability and Durability

As with all GLOCK pistols, the G45 Gen5 MOS is built to function in the harshest conditions. Its polymer frame resists impact and weather, while its simple internal design ensures fewer malfunctions. Combined with the ruggedness of the EOTECH EFLX optic, this package is engineered for combat-proven dependability trusted by professionals worldwide.

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8. Ideal Uses: Who Is It For?

The GLOCK G45 Gen5 MOS w/ EOTECH is perfect for:

• Law Enforcement & Military: Full-size control with compact maneuverability makes it an ideal duty pistol.

• Personal Defense/CCW: Despite its size, it can be carried concealed with proper holsters, offering maximum capacity and readiness.

• Competitive Shooting: Its accuracy, rapid sight acquisition, and optics integration make it well-suited for IDPA, USPSA, and other competitions.

• Range Enthusiasts: Enjoyable for recreational shooting thanks to low recoil and easy-to-use red dot aiming.

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9. Advantages Over Other Pistols

Compared to similar optics-ready pistols in its class, the GLOCK G45 Gen5 MOS offers:

• Proven GLOCK reliability and simplicity

• Out-of-the-box red dot capability with an included EOTECH optic

• Higher magazine capacity (17+1 rounds standard)

• Cross-compatibility with GLOCK magazines and accessories

• Superior aftermarket support (holsters, parts, optics, upgrades)

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10. Maintenance and Care

Like all GLOCKs, the G45 Gen5 MOS is easy to field strip and clean. Its low-maintenance design makes it an excellent choice for shooters who want durability without constant upkeep. The optic’s battery compartment is conveniently accessible without removing the sight, simplifying maintenance further.

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11. Why Choose the GLOCK G45 Gen5 MOS W/ EOTECH?

This pistol represents a future-proof defensive and tactical platform. It’s modern, adaptable, and ready for optics out of the box. You get:

• GLOCK’s legendary dependability

• Gen5 enhancements for improved ergonomics and performance

• A factory-mounted EOTECH reflex sight for immediate optics use

Whether you’re upgrading from an older GLOCK or buying your first duty/defensive pistol, this is a premium, optics-ready 9mm solution that provides excellent value and capability.

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12. Conclusion

The GLOCK G45 Gen5 MOS 4.02” 9MM 17RD Pistol with EOTECH 3MOA Mini Reflex Sight (PA455E203MOS) is the ideal blend of modern optics-ready technology, Gen5 upgrades, and GLOCK’s time-tested reliability. With its crossover frame/slide design, improved ergonomics, and premium reflex sight included, this pistol delivers outstanding performance for tactical professionals, competitive shooters, and civilian defenders alike.

If you are looking for a pistol that is ready for today’s shooting demands straight out of the box—featuring precision optics, high capacity, and unparalleled dependability—the G45 Gen5 MOS with EOTECH is an unbeatable choice. GLOCK G45 GEN5 MOS GLOCK G45 GEN5 MOS GLOCK G45 GEN5 MOS GLOCK G45 GEN5 MOS

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