Glock 17L Gen 5 MOS Slide

Glock 17L Gen 5 MOS Slide – $349.99+

The Glock 17L Gen 5 MOS Slide is the factory-original long-slide competition slide for Glock’s longest pistol. Featuring a 6.02-inch barrel, 8.86-inch slide, and 8.19-inch sight radius, the G17L delivers the maximum precision platform in the Glock lineup [citation:1][citation:5]. Discontinued by Glock in 2024 — this is limited dealer stock that cannot be restocked [citation:3][citation:5][citation:7].

Rare Long-Slide Competition Platform

The G17L was designed for competitive shooting — the extended barrel and slide deliver the longest sight radius available on any Glock, enabling faster target acquisition and more precise shot placement [citation:1][citation:8]. The Gen 5 MOS version added modern refinements including the Marksman Barrel, nDLC finish, ambidextrous slide stop, and factory MOS optic cut [citation:2][citation:5]. With Glock’s discontinuation of this model, genuine OEM slides are becoming increasingly scarce [citation:3][citation:18].

Built for Precision Competition

The G17L platform is purpose-built for competition shooting. The 6.02-inch Marksman Barrel delivers improved accuracy through enhanced polygonal rifling and a target-style crown [citation:5][citation:17]. The extended slide provides a well-balanced feel and the longest line of sight in the Glock family at 8.19 inches [citation:1]. Combined with the factory MOS cut, this slide is ready for the red dot of your choice.

Key Features and Benefits

Longest Slide and Sight Radius in the Glock Lineup

At 8.86 inches of slide length and 8.19 inches of sight radius (with polymer sights), the G17L delivers the maximum precision platform Glock produces [citation:1]. The longer sight radius makes sight alignment errors more visible, improving accuracy for competitive shooters [citation:8].

Gen 5 MOS Cut for Direct Optic Mounting

The factory MOS cut allows for direct mounting of popular red dot optics using included adapter plates. It supports Trijicon RMR/SRO, Holosun 507C/508T, Leupold DeltaPoint Pro, and more [citation:5][citation:8]. The MOS system provides a stable, repeatable mounting platform.

Premium nDLC Finish for Durability

The nDLC (nano Diamond-Like Carbon) matte black finish delivers exceptional resistance to wear, corrosion, and environmental exposure [citation:5][citation:17]. It keeps the slide functioning correctly under high-volume match use.

Stripped Glock 17L Gen 5 MOS Slide – $349.99

For custom builders supplying their own barrel, recoil spring, and internals:

• Glock 17L Gen 5 MOS Slide Shell — nDLC finish with front and rear serrations
• MOS Cover Plate — installed, removable for optic mounting
• Factory Front and Rear Sights — installed
• Channel Liner — pre-installed

Note: Does not include barrel, Gen 5 dual recoil spring assembly, or internal components. Always pair with Gen 5-specific components.

Confirmed Compatible Optics — Via Factory MOS Adapter Plates

• Trijicon RMR / SRO
• Holosun 507C / 508T / 509T
• Leupold DeltaPoint Pro
• Vortex Venom / Viper
• Shield RMS
• Sig Sauer Romeo1 Pro

For full technical specs on each optic, visit the manufacturer pages: Trijicon RMR · Holosun 507C · Leupold DeltaPoint Pro.

Competition Shooters

The G17L Gen 5 MOS was designed specifically for competition shooting [citation:1][citation:2]. The longest sight radius in the Glock lineup, Marksman Barrel, and factory MOS cut make it the precision platform for USPSA, IDPA, and action pistol sports [citation:8].

Collectors and Enthusiasts

With Glock’s discontinuation of the G17L Gen 5 MOS, genuine OEM slides are becoming increasingly rare [citation:3][citation:18]. For collectors, this represents an opportunity to acquire a piece of Glock’s long-slide history while stock remains available.

Precision Training

The extended sight radius makes the G17L an excellent training platform for marksmanship fundamentals. Long slides show trigger control and sight alignment errors more clearly, making them ideal for skill development [citation:8].

Custom Long-Slide Builds

Builders who want the ultimate long-slide Glock platform can use this slide as the foundation for a custom competition pistol. Combine with aftermarket match barrels, upgraded recoil systems, and premium optics [citation:4][citation:6].

1. Remove the MOS cover plate by backing out the retaining screws.
2. Identify the correct adapter plate for your optic from the included set.
3. Attach the adapter plate with a small drop of Blue Loctite on each screw.
4. Mount your optic to the adapter plate and torque to spec (typically 10–15 in/lbs).
5. Apply witness marks and bore-sight or live-fire zero at your intended distance.

What This Slide Is Compatible With

• Glock 17 Gen 5 frames [citation:15]
• Glock 34 Gen 5 frames [citation:15]
• Gen 5 specific 9mm barrels (6.02-inch G17L-length)
• Gen 5 dual captive recoil spring assemblies
• Gen 5 specific internals
• G17 (17-round), G17L (17-round), and extended magazines
• Full-size MOS-pattern red dot optics via included adapter plates

What This Slide Is NOT Compatible With

• Glock 17 Gen 3 or Gen 4 frames — different recoil spring geometry
• Glock 19, 45, or 47 Gen 5 frames — different slide dimensions
• Glock 26 Gen 5 frames — different platform
• Gen 3 or Gen 4 recoil spring assemblies — not compatible with Gen 5 slides

Important Compatibility Note

The Glock 17L Gen 5 MOS is compatible with Glock 17 Gen 5 and Glock 34 Gen 5 frames [citation:15]. It is not compatible with Gen 3 or Gen 4 frames, or with standard Glock 17 barrels — the G17L uses a 6.02-inch barrel, not the 4.49-inch G17 barrel.

nDLC Finish Care

Clean with standard solvents and protect with a light coat of gun oil or silicone cloth. The Gen 5 nDLC finish is highly resistant to holster wear and corrosion. Avoid abrasive cleaners that can dull the surface [citation:5].

Optic Screw Maintenance

Check optic screw torque every 500 rounds. Competition shooting involves high round counts and constant vibration — screws will loosen over time if not verified.

Marksman Barrel Care

The Marksman Barrel delivers its best accuracy when kept clean. Clean the bore after every range session and pay attention to the crown — damage to the crown will degrade accuracy [citation:5].

Gen 5 Dual Recoil Spring Replacement

The Gen 5 dual captive recoil spring assembly should be inspected at every cleaning. Replace it every 5,000 rounds for competition use.

About the Long-Slide Platform

Q: Is the Glock 17L Gen 5 MOS still in production? A: No. Glock discontinued the G17L Gen 5 MOS as part of their commercial lineup streamlining [citation:3][citation:5][citation:7]. This is limited dealer stock. Genuine OEM slides will become increasingly scarce. Q: What makes the G17L different from the G17? A: The G17L is a long-slide competition variant. It has a longer slide (8.86″ vs 7.32″), longer barrel (6.02″ vs 4.49″), and longer sight radius (8.19″ vs 6.5″). The G17L also has a slightly lighter trigger pull from the factory [citation:1][citation:8]. Q: What is the sight radius of the G17L Gen 5 MOS? A: The sight radius is 8.19 inches with polymer sights — the longest in the Glock lineup [citation:1].

Ordering and Support

Q: What payment methods do you accept? A: We accept all major credit cards, PayPal, and Apple Pay for secure checkout. Q: How long does shipping take? A: Most orders ship within 2–3 business days. Continental US delivery typically takes 3–5 business days after shipping. International orders usually arrive in 7–14 business days after shipping.

Maximum Precision Platform

The G17L delivers the longest sight radius and barrel in the Glock lineup. For competitive shooters who need every accuracy advantage, this is the platform [citation:1][citation:8].

Rare, Discontinued Model

With Glock’s discontinuation of the G17L Gen 5 MOS, this slide represents a rare opportunity to acquire a factory-original long-slide competition upper. Once current dealer stock is gone, it cannot be restocked [citation:3][citation:18].

Modern Gen 5 Features

The Gen 5 version includes the Marksman Barrel, nDLC finish, ambidextrous slide stop, and factory MOS optic cut — bringing the legendary G17L into the modern era [citation:2][citation:5].

Add to Cart Options

– Complete Glock 17L Gen 5 MOS Slide Assembly – $449.99 – Stripped Glock 17L Gen 5 MOS Slide – $349.99 📦 Free Shipping on Orders Over $300 🔒 Secure SSL Checkout ⚡ Ships Within 2–3 Business Days Related Products: Glock 17 Gen 5 MOS OEM Slide – Standard full-size MOS slide Glock 34 Gen 5 MOS OEM Slide – Competition long-slide (shorter than G17L) Glock 47 MOS OEM Slide – Modular full-size MOS Shop All Long-Slide & Competition Slides Explore Related: Glock 17 Slides · Glock 34 Slides · Glock MOS Slides · All Glock Slides For official Glock maintenance and armorer guidance, see Glock’s official resource page. For details on competition shooting rules and equipment divisions, see USPSA’s official rules page.