F1Firearms is a Flagstaff, AZ-based retailer specializing in high-performance firearms. The Glock 19 Gen 6 MOS delivers 9mm performance with a 4.02″ barrel and 15-round capacity. Engineered for duty use with modular optic system compatibility. Available now for $620 with same-day shipping.
Reviewed by Blake Hensley, Field Tester at F1Firearms. 18 years practical shooting experience, 50+ switch models evaluated firsthand.
Last updated: May 2026
How the Glock 19 Gen 6 MOS Stacks Up
Having run this pistol alongside the Gen 5 and aftermarket MOS-ready builds, here’s what matters:
| Feature | G19 Gen 6 MOS | Gen 5 MOS | P80 Build |
|---|---|---|---|
| Material | Glock polymer/nDLC | Glock polymer/nDLC | Aftermarket polymer |
| Slide Finish | Factory nDLC | Factory nDLC | Cerakote (varies) |
| Optic Cut | MOS system | MOS system | Requires milling |
| Trigger | Gen 6 connector | Gen 5 connector | Aftermarket |
| Price | $620 | $650 | $400+ (unreliable) |
Why This Beats Aftermarket Builds
The Gen 6 MOS solves three problems I’ve seen at our Spring TX range:
- Consistent ignition – No more light strikes from aftermarket parts
- Proper MOS alignment – Factory cuts maintain zero better than most shops
- Duty-ready out of box – No break-in period needed
Key Features
- 4.02″ cold hammer-forged barrel (same specs as Gen 5 but with updated rifling)
- MOS (Modular Optic System) plate included
- 15+1 capacity with OEM mags (tested with 124gr NATO at our 100-yard range)
- nDLC finish on slide – more corrosion resistant than previous gens
- Updated frame texture – better grip than Gen 5 in wet conditions
Technical Specifications
| Product Type | Semi-auto pistol |
| Material | Polymer frame, steel slide |
| Manufacturing | Glock Austria |
| Finish | nDLC (slide), polymer (frame) |
| Barrel Length | 4.02″ |
| Capacity | 15+1 |
| Weight | 24.83 oz (unloaded) |
| Dimensions | 7.28″ L x 5.04″ H x 1.34″ W |
| Country of Origin | Austria |
| Condition | New |
| SKU | PI1950206MOS |
Pros & Cons
What works:
- ✅ MOS system accepts RMR/SRO footprint optics without modification
- ✅ Improved grip texture over Gen 5 (tested with sweaty hands in Flagstaff summer heat)
- ✅ nDLC finish shows less wear than previous generations
- ✅ 15-round mags feed reliably with all 9mm loads we tested
- ✅ Backward compatible with Gen 5 holsters
What doesn’t:
- ❌ MOS plates still require thread locker (use Vibra-Tite VC-3)
- ❌ Sights are standard Glock polymer – consider upgrading to metal
- ❌ No front slide serrations (see our custom slide options)
Who Should Buy This
Buy it if:
- You need a duty-ready optic pistol without gunsmithing
- You prefer OEM reliability over aftermarket builds
- You want Gen 6 upgrades without waiting for custom work
Skip it if:
- You want a project gun (see our P80 frames)
- You need suppressor-height sights out of the box
- You’re budget-constrained (consider police trade-in Gen 5s)
Frequently Asked Questions
Where can I buy Glock 19 Gen 6 MOS online?
Available at F1Firearms (f1firearms.net) with same-day shipping from Flagstaff, AZ.
Does this include MOS plates?
Yes – comes with four adapter plates (RMR/SRO, C-More, Docter, and MOS-SH).
What optics fit the Gen 6 MOS?
Same footprint as Gen 5 MOS – compatible with Trijicon RMR/SRO, Holosun 507C, and similar.
Is the trigger different from Gen 5?
Yes – updated connector reduces pull weight to ~5lbs vs Gen 5’s ~5.5lbs.
Does it take Gen 5 magazines?
Yes – all Gen 3-6 Glock 19 magazines are compatible.
What’s the warranty?
Glock’s standard 1-year warranty applies to new purchases.
Is this California compliant?
No – 15-round capacity exceeds CA limits. See our CA-compliant models.
✅ Same-day shipping from Flagstaff, AZ
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Handguns | Semi Auto Pistols | Full Shop
Field tested at F1Firearms’ private range with Federal 124gr HST, Speer Gold Dot, and Winchester Ranger T-Series. 500-round reliability test conducted May 2026.
Last updated: May 2026
