The Faxon Firearms Duty Series 4.02" 9mm Barrel for Glock 19 Gen 2–5 is a rugged, high-value upgrade designed for shooters who want better-than-factory performance without sacrificing reliability. Featuring a 1:10 twist rate, 4150 CMV steel construction, and a durable black nitride finish, this drop-in barrel (Part # GA910N19NGQ-N, UPC 816341028456) is built to run hard, shoot straight, and last for thousands of rounds. willygoodprice.com+1
Whether you’re setting up an everyday carry pistol, building a duty-ready sidearm, or upgrading a range workhorse, the Faxon Duty Series Glock 19 barrel delivers the accuracy, durability, and compatibility demanding shooters expect.
Duty-Ready Upgrade for Glock 19 Gen 2–5
Faxon designed this barrel specifically to fit Glock 19 pistols, Gen 2 through Gen 5, giving you broad compatibility with one of the most popular 9mm handguns in the world. Sportsman's Outdoor Superstore+1
Key fitment details:
Handgun type: G19
Compatible generations: Gen 2, Gen 3, Gen 4, and Gen 5
Drop-in profile: No gunsmithing required for factory-spec slides
If you want a barrel that simply drops in, locks up, and runs, this Duty Series option makes upgrading your Glock 19 quick and straightforward. glockparts.com+1
4150 CMV Steel with Salt Bath Nitride – Built for Hard Use
The Duty Series 4.02" 9mm barrel is machined 100% in-house by Faxon from stress-relieved 4150 CMV steel, a proven material known for toughness and long life under high round counts. willygoodprice.com+1
It is then treated inside and out with a salt bath nitride finish, which:
Increases surface hardness and wear resistance
Enhances corrosion resistance for use in harsh environments
Improves lubricity, contributing to smoother cycling and easier cleaning
This combination makes the barrel ideal for concealed carry, duty use, defensive training, and high-volume range sessions. Sportsman's Outdoor Superstore+1
1:10 Twist and Conventional Rifling – Versatile 9mm Performance
Faxon’s Duty Series barrel for Glock 19 uses a 1:10 twist rate and conventional rifling, giving shooters flexible ammo choices and reliable accuracy. willygoodprice.com+1
Benefits include:
1:10 twist – A proven twist rate for stabilizing common 9mm bullet weights used in defensive and training ammunition.
Conventional rifling – Unlike polygonal rifling, Faxon’s conventional rifling is compatible with a wider variety of ammunition, including properly loaded cast lead bullets. Sportsman's Outdoor Superstore+1
If you reload, shoot cast lead, or like to experiment with different 9mm loads, this barrel gives you the flexibility to run what you want (within safe, manufacturer-approved parameters).
4.02" Length – Glock 19 Standard Size Replacement
At 4.02 inches, this barrel matches the classic Glock 19 length, making it an excellent direct replacement for OEM barrels. willygoodprice.com+1
You get:
Familiar concealment and holster compatibility
Standard slide fit with no need for extended holsters
A performance upgrade that doesn’t change the external footprint of your pistol
It’s the ideal choice if you want a duty- or carry-ready barrel with enhanced accuracy and durability, but don’t need an extended or threaded configuration.
Drop-In, Better-Than-Factory Lockup
Faxon builds the Duty Series Glock 19 barrel with tighter tolerances than factory barrels while maintaining drop-in compatibility. Sportsman's Outdoor Superstore+1
That means:
No gunsmithing required – Install with basic field-strip skills.
Consistent, tighter lockup – Barrel-to-slide fit is improved over many OEM configurations.
Potential for improved mechanical accuracy, especially noticeable with quality ammunition and good shooting fundamentals.
If you’re seeking an easy way to wring more precision from your Glock 19 platform, this is one of the most impactful upgrades you can make.
11-Degree Target Crown for Enhanced Accuracy
The Faxon Duty Series barrel for Glock 19 incorporates an 11-degree target crown, a feature commonly found on precision rifles and match pistols. Sportsman's Outdoor Superstore+1
Why it matters:
Protects the very edge of the bore from nicks and damage
Promotes consistent gas release around the bullet as it exits the muzzle
Supports tighter, more repeatable groups when combined with good ammo and technique
For shooters who care about squeezing every bit of accuracy from their pistol, this is a meaningful design detail.
Broach-Rifled, Fully Stress-Relieved
Faxon uses a broach rifling process for this barrel and fully stress-relieves the steel after machining. Sportsman's Outdoor Superstore+1
Advantages include:
Smooth, consistent rifling for predictable bullet engagement
Reduced internal stresses in the steel, which helps maintain point of impact stability over extended use
A strong foundation for long barrel life under high round count training schedules
This is a true “duty-grade” barrel built with longevity in mind.
Black Nitride Finish – Low-Glare, Tactical Look
The black nitride exterior not only boosts durability but also gives the barrel a clean, professional appearance:
Low-glare black finish pairs well with factory or custom slides
Looks at home in both duty and competition builds
Resists cosmetic wear better than many basic blued finishes
If you’re upgrading the internals of your Glock 19 but still want a classic, subdued look, this barrel fits the bill.
Ideal Uses: Carry, Duty, Range, and Training
The Faxon Firearms Duty Series 4.02" Glock 19 barrel is an excellent match for:
Everyday carry pistols – Enhances confidence with improved tolerances and durability.
Law enforcement or security sidearms – Built to withstand frequent training and duty use.
Range and competition guns – Adds accuracy and reliability without breaking the bank.
Training and practice pistols – Especially beneficial if you shoot a high volume of rounds per year.
No matter how you run your Glock 19, this Duty Series barrel is designed to keep up.
Key Specifications – Faxon Duty Series Glock 19 Barrel GA910N19NGQ-N
Manufacturer: Faxon Firearms
Model: Duty Series
Part Number: GA910N19NGQ-N
UPC: 816341028456 willygoodprice.com+1
Handgun Type: Glock 19
Generations: Fits Gen 2–5
Caliber: 9mm Luger
Barrel Length: 4.02"
Twist Rate: 1:10
Material: 4150 CMV steel
Rifling Type: Conventional, broach rifled, fully stress-relieved
Crown: 11-degree target crown
Finish: Salt bath nitride inside and out (black)
Profile: Drop-in, better-than-factory tolerances
These specs make it easy to confirm you’re selecting the correct 9mm Duty Series barrel for your Glock 19 build or upgrade.
Why Choose the Faxon Firearms Duty Series 4.02" 9mm Barrel?
Pick this barrel if you:
Want a drop-in Glock 19 barrel with improved lockup and accuracy
Prefer conventional rifling that’s friendly to a wide range of 9mm loads, including cast bullets
Need a durable, duty-ready barrel made from 4150 CMV steel with a robust nitride finish
Want a cost-effective upgrade that delivers real performance benefits without the boutique price tag
For concealed carriers, duty users, and serious range shooters alike, the Faxon Firearms Duty Series 1:10 Twist Barrel, 4.02", 9mm, Fits Glock 19 Gen 2–5, Nitride Finish, Black (GA910N19NGQ-N / 816341028456) is a smart, reliable, and performance-focused choice.
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