Description
Glock 17 Gen 4 FS 9mm Luger 4.49 17rd night sights
Glock 17 Gen 4 FS 9mm Luger 4.49 17rd night sights
The Glock 17 Gen4 FS (Front Serrations) 9mm Luger with 4.49″ barrel, 17-round magazine capacity, and factory night sights is a full-size striker-fired pistol designed for duty, law enforcement, defensive use, training, and competition. The “Used Excellent!” description indicates a previously owned firearm in very good condition, typically showing only minor handling or holster wear.
Basic Specifications
| Feature | Details |
|---|---|
| Manufacturer | Glock |
| Model | Glock 17 Gen4 FS |
| Caliber | 9×19mm Luger |
| Action | Striker-fired |
| Operating system | Glock Safe Action® |
| Barrel length | 4.49 inches (114 mm) |
| Capacity | 17+1 rounds |
| Magazine type | Double-stack detachable magazine |
| Frame | Polymer |
| Slide | Steel with Tenifer/nDLC-type finish (depending on production period) |
| Sights | Factory night sights |
| Generation | Gen4 |
| Front serrations | Yes (FS model) |
| Weight (without magazine) | Approximately 22.2 oz |
| Overall length | Approximately 7.95 inches |
| Height | Approximately 5.47 inches |
| Width | Approximately 1.26–1.34 inches depending on measurement method |
Gen4 Features
1. Modular Backstrap System
The Gen4 frame introduced:
- Interchangeable backstraps
- Better grip customization
- Improved fit for different hand sizes
Included backstraps allow adjustment of:
- Grip circumference
- Trigger reach
- Shooting comfort
2. Rough Texture Frame (RTF)
Gen4 models feature a more aggressive grip texture than earlier generations:
- Better wet-weather control
- More secure grip during recoil
- Improved handling with gloves
3. Ambidextrous Magazine Release
The magazine release is:
- Larger than Gen3 versions
- Reversible for left-handed shooters
4. Dual Recoil Spring Assembly
The Gen4 recoil system uses a dual spring assembly designed to:
- Reduce felt recoil
- Increase service life
- Reduce slide impact forces
FS (Front Serrations) Model
The FS designation means the pistol has front slide serrations.
Advantages:
- Easier press checks
- More grip options when manipulating the slide
- Faster slide handling for some shooting techniques
The FS version is a desirable configuration because many older Gen4 Glock 17 pistols were produced without factory front serrations.
Night Sights
This configuration includes factory-installed night sights.
Typical features:
- Tritium illumination
- Three-dot sight picture
- Visible in low-light conditions
When buying used, check:
- Brightness of the tritium inserts
- Sight alignment
- Any damage to sight housings
Tritium sights gradually lose brightness over time, with many lasting roughly a decade or more depending on manufacture date and storage.
Barrel and Accuracy
Barrel:
- 4.49-inch Glock factory barrel
- Polygonal rifling
- Designed for reliability and long service life
Typical accuracy:
- Around 2–4 inches at 25 yards depending on ammunition and shooter skill
- More than adequate for duty, defensive, and training roles
Magazine Capacity
Standard configuration:
- 17-round magazine
- 17+1 total capacity when chambered
Compatible magazines include:
- Glock 17 Gen3/Gen4 magazines
- Glock 19 magazines
- Glock 34 magazines
- Glock 18 extended magazines (where legally permitted)
Used Excellent Condition Checklist
When inspecting a used Glock 17 Gen4 FS, check:
Slide & Finish
✅ Minor holster marks are normal
✅ Check for rust or deep scratches
✅ Inspect breech face and slide rails
Barrel
✅ Look for:
- Sharp rifling
- No pitting
- Normal finish wear near locking surfaces
Frame
Check:
- No cracks around dust cover
- No damage around slide rails
- Magazine well condition
Internal Parts
Inspect:
- Recoil spring assembly
- Trigger mechanism
- Extractor
- Slide stop
Glocks are known for long service lives, and used examples often remain reliable with proper maintenance.
Strengths
✅ Extremely reliable platform
✅ High 17-round capacity
✅ Factory night sights
✅ Front serrations
✅ Excellent aftermarket support
✅ Easy maintenance
✅ Affordable magazines and parts
✅ Proven duty history
Weaknesses
❌ Larger grip than compact models like the Glock 19
❌ No factory optic cut
❌ Older Gen4 trigger feel compared with some Gen5 models
❌ Factory sights may eventually need replacement as tritium ages
Glock 17 Gen4 FS vs Gen5
| Feature | Gen4 FS | Gen5 |
|---|---|---|
| Front serrations | ✅ Yes | Usually yes |
| Barrel | Standard Glock barrel | Glock Marksman Barrel |
| Magazine release | Reversible | Reversible |
| Slide stop | Left side | Ambidextrous |
| Optic-ready | ❌ No | MOS version available |
| Grip texture | Gen4 RTF | Improved Gen5 texture |
| Reliability | Excellent | Excellent |
Overall Assessment
The Glock 17 Gen4 FS 9mm with night sights is a highly regarded Glock configuration. It combines the proven full-size Glock 17 platform with desirable upgrades such as front slide serrations and factory night sights. A used excellent-condition example can be a strong value because it provides duty-grade reliability, high capacity, and features that many shooters would otherwise add aftermarket.
It is best suited for:
- Duty use
- Home defense
- Range training
- Competition-style shooting
- General-purpose ownership
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