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Glock

At 3CR Tactical, we offer an extensive selection of premium Glock parts to help you enhance, maintain, and customize your Glock handgun. Whether you’re looking to upgrade performance, improve accuracy, or personalize the look of your firearm, we have the Glock parts to fit your needs.

Glock Slides

Glock 19 slides and Glock 17 slides, stripped or shop-assembled, plus slides for the Glock 26, 23, 43/43X and 48. Choose an RMR-cut or iron-sight slide in black nitride, DLC or Cerakote. Our assembled slides are built in our Florida shop with the barrel, internals and sights installed, ready to drop on your frame. Most slides here fit Gen 3 frames (and Gen 1–2), so match the slide to your frame's model and generation.

Glock 19 slides · Glock 17 slides · Assembled slides · Fitment FAQ

What to decide before you buy

  • Optic cut — Glock 17, 19, 22, 23 and 26 slides are usually cut for the Trijicon RMR footprint. Slides for the Glock 43, 43X and 48 use the Shield RMSc footprint. The two are not interchangeable; see our RMR vs RMSc vs Holosun K footprint guide.
  • Finish — DLC is the hardest and most corrosion-resistant. Black nitride is the standard-duty finish at a lower price. Cerakote comes in colors (FDE, OD Green, Graphite Black). Our finish comparison covers real-world wear.
  • Generation — most slides here are cut for Gen 1–3 frames. Gen 4 uses a dual recoil spring, and Gen 5 frames need a different cover plate and slide stop clearance, so buy the slide made for your generation.
  • Stripped vs assembled — a stripped slide needs a barrel, recoil spring assembly and a slide completion kit. Shop-assembled Glock slides ship with the barrel, internals and cover plate installed.
Glock Slides
Glock Parts Kits

Glock parts kits bundle the small parts you need to finish a build or upgrade an existing pistol — slide completion kits, upper parts kits, lower and frame parts kits, and drop-in trigger kits for Glock 17, 19, 22, 23, 26, 34, 43, 43X, and 48. Gen 3, Gen 4, and Gen 5 options in 9mm, .40 S&W, and .45 ACP, plus frame kits for Polymer80 PF940 builds.

Which kit do you need?

  • Slide completion kit — the internals that finish a stripped slide: firing pin, extractor, plunger assembly, and cover plate (some ship with sights and a recoil rod). Pair one with a stripped Glock slide. Our slide completion kit guide breaks down every part; to shop slide kits on their own see Glock slide completion kits.
  • Upper parts kit — the same slide internals packaged by generation (Zaffiri Precision offers Gen 3, Gen 4, and Gen 5 kits for the Glock 17, 19, and 43X/48).
  • Lower / frame parts kit — the trigger assembly, connector, springs, pins, slide lock, and magazine catch that complete a frame or Polymer80 80% build (KCI, Lone Wolf, and Polymer80 kits for Gen 3 frames).
  • Trigger & conversion kits — drop-in trigger upgrades (Apex Action Enhancement) and .22 LR conversion kits (Advantage Arms) for compatible Gen 3/4 models.

Building the whole pistol? Start with a shop-assembled Glock slide and add the frame kit that matches your generation.

Glock Parts Kits
Compensators

Glock compensators and muzzle brakes for Glock 17, Glock 19 and Glock 26 threaded barrels (1/2x28), .40 S&W comps for the Glock 22 and 23, and narrow comps for the Glock 43/43X. Inventory covers 1/2x28 9mm threads (the universal Glock 9mm pitch) and 9/16x24 .40 S&W threads. Pick by caliber, thread pitch, and slide width — a Glock 19 comp will not clear a Glock 43X slide, and vice versa.

How to pick the right comp

  • Caliber and thread pitch — 9mm threaded Glock barrels use 1/2x28. .40 S&W and 10mm use 9/16x24. The thread pitch is stamped on the barrel near the muzzle. A 9mm comp will not thread onto a .40 barrel.
  • Slide width — full-size and compact 9mm comps fit Glock 17, 19, and 26 slides. Subcompact comps for the Glock 43, 43X, and 48 are narrower and will not pair with a Glock 19 slide. Do not cross platforms.
  • Generation fit — most compensators mount to the barrel threads, not the slide, so they fit Gen 3, Gen 4, and Gen 5 hosts interchangeably. A few — the Strike Industries Mass Driver and Agency Arms 417, for example — ship in generation-specific variants (Gen 3 / Gen 4 / Gen 5); the SKU calls out which generation, so order the variant that matches your host pistol.
  • Comp vs brake — a compensator vents gas upward to reduce muzzle rise (flatter shooting, faster follow-up shots). A muzzle brake vents sideways to reduce felt recoil. Most pistol "comps" do both to varying degrees. Our compensator explainer covers the physics and what you can realistically expect.
  • Micro vs full-size — micro comps (like the 3CR 9mm Micro Compensator) are 1-inch or shorter and add minimal length to your slide profile. Full-size comps are 2-3 inches and produce more dramatic recoil reduction at the cost of holster compatibility.

Does a micro comp actually work?

Short answer: yes, but expect modest gains on subsonic 9mm. They shine on lighter recoiling rounds when you want flatter splits at speed. We unpack the data in this breakdown. Pair any comp with a threaded Glock barrel in matching caliber.

Compensators
Barrels

Glock Barrels

Upgrade your Glock 17, 19, 23, 26, 43, 43X, or 48 with a drop-in aftermarket barrel — match-grade accuracy, threaded options for compensators and suppressors, and finishes from stealth black nitride to gold TiN. We stock 9mm, .40 S&W, 10mm, and .357 SIG barrels for Gen 1–5 frames, all shipped free with live stock counts.

What to decide before you buy

  • Caliber & model — match the barrel to your Glock's caliber and frame size. A Glock 19 barrel won't fit a Glock 17, and a 9mm barrel won't run .40 S&W. A .40 Glock 22/23 can be converted to 9mm with a conversion barrel — see our Glock 23 9mm conversion guide.
  • Threaded vs. non-threaded — threaded 9mm barrels use a 1/2x28 pitch and pair directly with a compensator, muzzle brake, or suppressor. Not sure you need one? Read is a threaded barrel worth it.
  • Finish — black nitride (QPQ) is the hardest, most corrosion-resistant standard-duty finish; stainless and DLC add durability; TiN gold and other PVD coatings are decorative and will show wear at metal-to-metal contact points over time. Full breakdown in our barrel finish guide.
  • Profile — standard, fluted (lighter, faster cooling), or ported. All are drop-in for the matching Glock model.
  • Generation fit — most barrels are drop-in for Gen 1–5 of the matching model; check the listing for any generation notes.

Build it out

Pair a threaded barrel with a 9mm compensator, or skip the build and grab an assembled slide with the barrel, internals, and sights already installed and function-tested in our Florida shop.

Other pistols — we also stock True Precision and Zaffiri barrels for the Ruger RXM, Springfield Hellcat and Hellcat Pro, and Sig P365 and P320.

Every barrel ships free, and stock levels shown are live.

Barrels
Pistol Optics

Pistol Optics

Are you looking for an edge when it comes to shooting your handgun? Pistol optics and sights can be a great way to improve accuracy, speed up target acquisition, and extend the range of your weapon.

Pistol Optics
Pistol Sights

Glock Iron Sights & Night Sights

Front and rear sight sets for Glock pistols — steel night sights with tritium, fiber-optic sights, and OEM-style replacement sets from Glock OEM, Truglo, Ameriglo, and more. Upgrade to a faster sight picture for carry and duty, or set up a co-witness with a red dot. Pair with an aftermarket slide or browse Glock pistol optics. Free shipping on every set.

Pistol Sights
Misc Parts

Glock Internal & Replacement Parts

The small parts that keep your Glock running and tune how it feels — guide rods and recoil assemblies, triggers and trigger kits, locking blocks, thread protectors, and more for Glock Gen 1-5 pistols. Upgrade a single component or refresh the whole fire-control group. Building a slide? Pair these with a Glock barrel and an aftermarket slide. Free shipping on every order.

Misc Parts
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