Glock G47 MOS: The Full-Size 9mm You've Never Heard Of
The Glock G47 MOS is essentially a G17 Gen5 MOS with the G45's shorter slide dimensions—except it's not available to civilians. Originally developed for U.S. Customs and Border Protection, this pistol combines a full-size frame with a slightly modified slide and an optics-ready platform. Unless you're law enforcement or military, you're not getting one new from Glock. That said, understanding what makes the G47 different matters if you're shopping for a duty-grade 9mm or considering the used market down the road.
What Makes the G47 Different
At first glance, the G47 looks like a G45 or G17. The differences are subtle but deliberate. It uses the full-size G17 frame with a 17+1 capacity, but the slide features front serrations like the Gen5 models and an MOS (Modular Optic System) cut for mounting red dots. The barrel length is 4.49 inches, matching the G17.
Where it diverges from the G17 MOS is in the slide's internal dimensions and how it interfaces with certain mounted accessories. The changes were made to meet specific contract requirements, not because Glock decided civilians needed another model. For most shooters, these differences won't matter in practical use—it's still a Glock 9mm with all the reliability that entails.
Key Specifications
- Caliber: 9mm Luger
- Capacity: 17+1 rounds
- Barrel Length: 4.49 inches
- Overall Length: 7.95 inches
- Width: 1.26 inches
- Weight (unloaded): 24.69 oz
- Sights: Standard Glock polymer, MOS optic plates included
- Finish: nDLC coating on slide
- Frame: Polymer with Glock Marksman Barrel (GMB)
Who Should Consider It (If You Can Get One)
This is a duty pistol, plain and simple. If you're in law enforcement or military procurement and your agency is evaluating options, the G47 MOS deserves a look. It offers optics mounting out of the box, proven Gen5 ergonomics, and the aftermarket support that comes with the Glock ecosystem.
For civilians in Washington or anywhere else, you're better off looking at the G17 Gen5 MOS or G45 MOS. They're functionally identical for defensive or competition use. The G47's exclusivity doesn't translate to performance advantages that justify hunting one down on the secondary market at inflated prices.
How It Stacks Up
Against other full-size duty pistols, the G47 competes with the usual suspects: the Sig Sauer P320 M18/M17, Smith & Wesson M&P9 M2.0, and CZ P-10 F. All offer similar capacity, optics-ready configurations, and proven durability.
The Glock advantage remains simplicity. Fewer manual safeties, a consistent trigger pull, and parts availability everywhere. The Safe Action trigger isn't the crispest, but it's predictable. For someone carrying daily, that matters more than a two-pound advantage in trigger weight.
The downside? Glock's grip angle and texture aren't for everyone. I've run Glocks for years and they work fine, but if you have smaller hands or prefer a more aggressive grip texture, look at the M&P or even modify the frame yourself.
Real-World Considerations
If you're actually carrying this gun on duty, the MOS system is useful. Mounting a red dot like a Trijicon RMR or Holosun 509T gives you faster target acquisition, especially in low light. The included plates work, though I'd recommend aftermarket options like C&H Precision for a more secure fit.
The G47 uses the same magazines as the G17, G19, and G45. That's a significant logistical advantage if your agency or unit already runs Glocks. Spare parts, holsters, and magazines are everywhere.
Bottom Line: The Glock G47 MOS is a solid duty pistol with no real surprises—it's a G17 Gen5 MOS with minor contract-specific tweaks. For civilians, skip the hype and buy a G17 or G45 MOS instead; you'll get the same performance without the restricted availability.
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