Description
If you are in the market for a dependable, modern service pistol that balances a full-size grip with a compact slide, the Glock G45 Gen5 MOS 9mm 4.02in Black is a fine choice. Chambered in 9mm, this cross-over handgun pairs the proven Gen5 internals with an MOS cut slide, ready for miniature red dot optics. It handles like a full-size but carries like a compact, making it a natural fit for duty, home defense, or a day at the range.
Specifications at a Glance
| Manufacturer | Glock |
|---|---|
| Model | G45 Gen5 MOS |
| Material | Polymer frame, steel slide (per manufacturer specs) |
| Compatibility | 9mm Luger |
| Finish | Black nDLC |
| Weight | Approx. 21.9 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features That Matter
- MOS Optic System — Why it matters: This slide is pre-machined to accept miniature red dot optics using adapter plates, so you can run a Holosun or Trijicon without sending the slide off for milling. It keeps your setup fast and flexible.
- Glock Marksman Barrel (GMB) — Why it matters: The enhanced rifling and crowned muzzle deliver consistent, repeatable accuracy shot after shot. That means tighter groups whether you are punching paper or hunting birds.
- Front Slide Serrations — Why it matters: When you need to press-check or clear a malfunction, those serrations up front give you extra purchase. No more slipping on a sweaty or gloved hand.
- Interchangeable Backstraps — Why it matters: The frame comes with three backstraps so you can dial in the grip size to fit your hand. A proper grip means better control and faster follow-up shots.
- Flared Magwell — Why it matters: That subtle funnel at the bottom of the grip guides magazines home during reloads. In a hurry, every millisecond counts, and this helps you get back on target.
Who This Pistol Is For
The Glock G45 Gen5 MOS is built for shooters who want a full-size grip for recoil management and magazine capacity but prefer a shorter slide for easier carry and holster draw. It suits law enforcement, armed citizens, and bird hunters who need a reliable sidearm that rides close but shoots big. If you value modern features like an optic-ready slide and a crisp trigger, this one fits right in.
Pros & Cons
- Pro: MOS system lets you mount optics without aftermarket machining.
- Pro: Glock Marksman Barrel provides excellent accuracy for a production pistol.
- Pro: Interchangeable backstraps and flared magwell enhance ergonomics and speed.
- Con: The MOS plates are known to have a slight gap between the optic and slide, which can allow debris to collect. A quality sealing plate or aftermarket plate fixes this easily.
How It Stacks Up Against the Competition
| Feature | Glock G45 Gen5 MOS | Zev Technologies OZ9 | Agency Arms AOS G19 |
|---|---|---|---|
| Slide Length | 4.02 inches | 4.17 inches | 4.02 inches |
| Frame | Full-size polymer | Modular steel/polymer | Compact polymer |
| Optic Mount | MOS system (plates) | Proprietary Zev cut | Agency Optic System (AOS) |
| Price | $648.80 | ~$1,200+ | ~$1,000+ |
| Best For | Value, duty, everyday carry | Competition, custom builds | Duty, precision shooting |
Frequently Asked Questions
Does the Glock G45 Gen5 MOS come with optic plates?
Yes, it includes a set of MOS adapter plates in the box (typically plates #01 through #04) so you can mount most popular red dot optics like Trijicon RMR, Holosun 407C/507C, and others. Check the included plate chart to match your optic footprint.
Can I use standard Glock 19 holsters with the G45?
Yes, in most cases. The G45 has the same slide profile as a Glock 19 (4.02-inch barrel) and the same frame length as a Glock 17. Many holsters made for the Glock 19 will fit, but always verify with the holster manufacturer to be sure.
What is the magazine capacity for the G45 Gen5 MOS?
The pistol ships with two 17-round magazines standard for 9mm. Depending on your state laws, it may come with 10-round magazines if restricted. Check product listing details for your specific order.
Is the Glock G45 Gen5 MOS suitable for concealed carry?
It can be, especially with a good holster and belt. The compact slide makes it easier to carry than a full-size Glock 17, but the full-size grip can print more than a subcompact. Many folks carry it appendix or strong-side with a cover garment.
Why Buy From Us?
- ✓ Nationwide delivery to all 50 states (restrictions apply per local laws)
- ✓ Ships within 1–2 business days from our FFL partner
- ✓ 30-day return policy on new, unfired firearms
- ✓ Secure checkout with encrypted payment processing
Looking for more options? Browse our Semi Auto Handguns or check out Glock Parts & Accessories. For those building from scratch, see our Firearms Kits.
Last updated: April 2026
Reviews
There are no reviews yet.