Description
The Glock G45 Gen5 MOS Crossover 9mm 4.02in 17+1 is a factory crossover pistol that mates a compact slide with a full-size frame. It gives you the concealability of a shorter barrel and slide with the grip length and magazine capacity of a duty-size handgun. The MOS (Modular Optic System) slide is pre-milled for miniature red dot optics, and it ships with an adapter plate so you can mount your preferred dot without extra gunsmithing. According to Glock specs, the barrel is 4.02 inches and the overall length is 7.44 inches, making it a true crossover for shooters who want one gun for home defense, range training, and concealed carry.
| Manufacturer | Glock |
|---|---|
| Model | G45 Gen5 MOS Crossover |
| Material | Polymer frame, steel slide with nDLC finish |
| Compatibility | Glock 9mm magazines (Gen5), MOS optic plates |
| Finish | nDLC (non-reflective black) |
| Weight | 21.16 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- MOS Slide (Modular Optic System) — Why it matters: You can mount a miniature red dot sight directly to the slide using the included adapter plates, which speeds up target acquisition and helps new shooters learn sight alignment faster.
- Glock Marksman Barrel (GMB) with Polygonal Rifling — Why it matters: The enhanced barrel profile and target-style crown improve accuracy out of the box, so your family can shoot tighter groups at the range without aftermarket parts.
- Flared Mag-Well — Why it matters: The wider magazine opening makes reloads easier under stress, especially for smaller hands or newer shooters who are still building muscle memory.
- Ambidextrous Slide Stop Levers — Why it matters: Left-handed family members can operate the slide release without changing their grip, making the G45 truly ambidextrous for any shooter.
- Removal of Finger Grooves — Why it matters: The Gen5 frame fits a wider range of hand sizes, so your teen or spouse can get a consistent, comfortable grip without the grooves dictating finger placement.
Who It’s For
This pistol is built for families who want one handgun that does it all: home defense, range training, and concealed carry. It’s especially good for newer shooters because the full-size frame soaks up recoil better than a subcompact, while the compact slide makes it easier to carry. If you’re teaching your partner or older teenager how to shoot, the G45 Gen5 MOS gives them a forgiving platform that grows with their skills.
Pros & Cons
- Pro: Factory MOS cut means no aftermarket milling needed — saves time and money.
- Pro: 17+1 round capacity with Glock factory magazines, plus two extra mags included.
- Con: The MOS system uses a specific plate footprint — some aftermarket optics may need a separate adapter plate if they don’t match the included ones.
Comparison: Glock G45 Gen5 MOS vs. Zev Technologies OZ9 vs. Agency Arms AOS G19
| Feature | Glock G45 Gen5 MOS | Zev Technologies OZ9 | Agency Arms AOS G19 |
|---|---|---|---|
| Price | $771.10 | $1,400+ | $1,200+ |
| Slide Length | 4.02 inches | 4.49 inches | 4.02 inches |
| Frame | Polymer, full-size grip | Aluminum grip module | Polymer, compact |
| Optic Ready | MOS (plates included) | RMR cut (direct mount) | AOS system (plates included) |
| Magazine Capacity | 17+1 | 17+1 | 15+1 |
| Best For | Budget-friendly crossover, family training | Competition / custom build | Duty / premium carry |
FAQ
What optics fit the Glock G45 Gen5 MOS without an adapter plate?
The MOS system uses a specific footprint. Direct-fit optics include the Trijicon RMR, Holosun 407C/507C, and Aimpoint Acro P-1. For other optics, use the included adapter plates — they cover most common footprints like Docter/Noblex and C-More.
Can I use Gen3 or Gen4 magazines in the G45 Gen5 MOS?
Yes, Gen5 pistols accept Gen3 and Gen4 Glock 9mm magazines. However, the Gen5 magazines have an extended floor plate and an orange follower for easier visual inspection. The G45 ships with two Gen5 17-round magazines.
Is the Glock G45 Gen5 MOS good for concealed carry?
Yes, the 4.02-inch slide is the same length as a Glock 19, so it conceals well under an untucked shirt or jacket. The full-size grip prints slightly more than a subcompact, but a good holster and belt minimize that. Many families use it as a do-it-all pistol for carry and home defense.
Does the G45 Gen5 MOS come with suppressor-height sights?
No, it comes with standard-height Glock polymer sights. If you plan to co-witness through a red dot, you’ll need to swap them for aftermarket suppressor-height sights. Glock offers factory night sights as an option, but they are not included with the MOS package.
Why Families Choose This Pistol
According to industry data from the National Shooting Sports Foundation, crossover pistols like the G45 now account for over 30% of new handgun sales to first-time buyers. The G45 Gen5 MOS gives you a modern, optic-ready platform at a price that won’t break the family budget. It’s a safe, reliable choice for teaching the next generation of shooters.
✓ Nationwide delivery — ships to all 50 states (see checkout for restrictions)
✓ Ships 1-2 business days from our FFL-licensed warehouse
✓ 30-day returns on unfired, unmodified firearms
✓ Secure checkout with encrypted payment processing
Explore more options: Semi Auto Handguns | Glock Parts & Accessories | Red Dot Optics
Last updated: April 2026
Reviews
There are no reviews yet.