G34 Slide, Gen3 Compatible Slide for Glock 34, RMR Optic Cut, Top Window Port, Stainless

G34 / G17 Compatible Gen3 Slide – Stainless Steel – RMR Optic Cut

Upgrade your pistol with the Mid-State Firearms G34 / G17 Gen3 Compatible Slide. This precision-machined stainless steel slide is designed for shooters who want improved performance, red-dot capability, and competition styling while staying on the Glock Gen3 platform.

Because the Glock 34 and Glock 17 share identical frame dimensions, this slide installs directly onto both frames. Whether you’re building a competition pistol, duty gun, or custom Glock project, this slide provides the versatility and reliability serious shooters expect.

The G34 slide is longer than the G17 slide — that’s the core difference.

Barrel/slide length:

• G17 slide: 4.49″ barrel
• G34 slide: 5.31″ barrel

The G34 is Glock’s “long slide” competition variant of the G17. Both are full-size 9mm pistols built on the exact same frame, which is why the slides are interchangeable on the frame itself — but the slides are not interchangeable with each other. A G34 slide won’t fit on a G17 upper parts configuration and vice versa without the matching barrel length.

Why the longer slide matters:

• Longer sight radius = more accurate shot-to-shot alignment, which is why the G34 is popular in USPSA and IDPA competition
• Slightly softer recoil impulse due to the longer slide mass cycling
• Heavier overall, which some shooters prefer for stability

What they share (same frame):

Same rail dimensions
Identical grip frame dimensions
Same magazine (G17 mags fit both)
Same trigger group and lower parts

---

Why Choose This Slide

• ✔ Fits Glock 34 Gen3 and Glock 17 Gen3 frames
• ✔ RMR footprint optic cut – mount red dots directly with no adapter plate
• ✔ Top window port reduces reciprocating mass and improves cooling
• ✔ Stainless steel construction for durability and corrosion resistance
• ✔ Works with factory G17/G34 Gen3 barrels, recoil springs, and sights
• ✔ Compatible with 30+ RMR footprint optics
• ✔ Ideal for USPSA, IDPA, 3-Gun, and custom Glock builds

---

Precision Machined Stainless Steel

This slide is machined from stainless steel billet for long-term durability and corrosion resistance. Compared to aluminum slides, stainless steel maintains tighter tolerances and holds up better to heavy firing schedules and holster wear.

The result is a slide that delivers consistent cycling, excellent reliability, and long service life.

---

Direct Mount RMR Optic Cut

The slide features an integrated Trijicon RMR footprint optic cut, the most widely adopted red dot pattern in the pistol optics industry. This allows direct mounting of many popular optics with no adapter plate required.

If you’re exploring other optic-ready options, browse our full selection of:
Glock RMR Optic Ready Slides

---

Competition-Style Window Cut

The top window port reduces slide weight and improves heat dissipation during extended shooting sessions. Reducing reciprocating mass can help improve slide speed and recoil impulse, making it a popular feature for competition and performance builds. :contentReference[oaicite:0]{index=0}

---

Frame Compatibility

• ✔ Glock 34 Gen3
• ✔ Glock 17 Gen3

The Glock 34 and Glock 17 share the same frame size, allowing cross-compatibility with slides designed for the platform.

---

Complete Your Build

This listing includes the slide only.
To complete your upper assembly you will also need:

• Barrel
• Recoil Spring Assembly
• Slide Parts Kit (UPK)
• Sights

Mid-State Firearms carries everything needed to finish your build:

• Glock Slide Parts Kits (UPK)
• Complete Glock Slides – Slide, Barrel & Parts Kits
• Shop All Gen3 Glock Slides
• Browse All Glock-Compatible Slides

---

Compatible Optics (RMR Footprint)

The following optics mount directly to the RMR cut:

• Trijicon – RMR, SRO
• Holosun
  • 407C / 407C-GR
  • 407CO
  • 507C / 507C-GR
  • 507 Comp / 507 Comp-GR
  • 508T-RD / 508T-GR
• Swampfox
  • Justice
  • Liberty
  • Kingslayer
• ADE Advanced Optics
  • RD3-019 Stingray
  • RD3-020 Raptor
  • RD3-023 Valkyrie
• Vector Optics – Frenzy Series
• Victoptics – V3
• Riton – X3 Tactix PRD
• Redwin – Cobra 26×22
• Spina – BAT-24

---

Important Information

This product includes the slide only. Barrels, sights, optics, and internal components are sold separately.

To complete your build quickly, check out our Glock slide parts kits or browse complete slide bundles .

---

DISCLAIMER: “GLOCK” is a federally registered trademark of GLOCK, Inc. Mid State Firearms LLC is not affiliated with, authorized by, endorsed by, or in any way officially connected with GLOCK, Inc. or GLOCK Ges.m.b.H. For genuine GLOCK products visit glock.com. This product is not manufactured, authorized, endorsed, or warranted by GLOCK.

Note: When installing sights, use a tool that fully supports the while side of the slide. Using something like the mgw sight pusher tool that only grabs a small sliver of rail could risk cracking the rail.