How to Field Strip a Glock 19 (Disassembly & Reassembly Guide)
This guide is written for beginners and follows the official GLOCK owner manual. The same steps apply to the Glock 17, Glock 19X, Glock 26, Glock 45, and other Gen 5 pistols, and no takedown tool is required for routine field stripping. For the latest factory diagrams and instructions, download the official manual from GLOCK's downloadable materials page.
The 3 Controls You Need to Know
If you've never taken a Glock apart before, these three names make the rest of the guide much easier:
- Magazine catch / magazine release: the button you press to remove the magazine.
- Slide stop lever: the thin lever used to lock the slide open.
- Slide lock: the two small takedown tabs above the trigger area. You pull these straight down to remove the slide. Some online guides also call this the "slide lock lever" or "takedown lever," but the Glock manual just calls it the slide lock — and unlike a SIG P365, the Glock does not have a separate rotating takedown lever.
Part 1: Confirm It's Unloaded
Step 1. Remove the magazine by pressing the magazine catch.
This only removes the magazine. It does not automatically empty the chamber.
Step 2. With your finger off the trigger and outside the trigger guard:
- Push up on the slide stop lever
- Grasp the rear serrations
- Pull the slide fully to the rear to eject anything that may be in the chamber and lock the slide.
The front and rear serrations are the ridged grooves at the front and back of the slide.
Step 3. Visually and physically inspect both the chamber and the magazine well. Look into the chamber, then feel into it with a finger or the chamber flag.
Step 4. Release the slide and let it return to the forward position.
Step 5. Point the pistol in a safe direction and pull the trigger.
If Step 5 makes you uneasy, that's normal. For a Glock, that is exactly why Step 3 matters so much. Do not rush it, and do not skip it.
Part 2: Disassembly (Field Strip)
Step 6. Locate the slide lock — the ambidextrous tabs right above the trigger guard. You will pull both of them down simultaneously to unlock the slide in Step 8. Note: if you try to pull them down now, they will stay in place.
Step 7. Hold the pistol in your firing hand with your fingers across the top rear of the slide. Retract the slide only about 1/8 inch, or roughly 3 mm, and hold it there. With your fingers over the top of the slide and your thumb under - it should feel like making a fist, rather than pulling.
This is the part most beginners overdo. You are not racking the slide again. You just want a tiny rearward movement, barely enough to feel it move. If you pull too far back, the trigger resets to the forward position. If that happens, point the pistol in a safe direction and pull the trigger again before continuing.
Step 8. While holding the slide in that slightly rearward position, use your support-hand thumb and index finger to pull the slide lock straight down evenly on both sides. These are the two small takedown tabs above the trigger area.
Step 9. Keep the slide lock pulled down and guide the slide forward off the frame.
The slide comes straight forward off the front of the frame. If it does not move, the usual reason is that the slide was pulled too far back in Step 7 and the trigger reset.
If the slide does not come off:
- Make sure the trigger was pressed in Step 5.
- Make sure you moved the slide only a tiny amount in Step 7.
- Make sure both sides of the slide lock are being pulled straight down together.
Step 10. Press the recoil spring assembly slightly toward the muzzle, then lift it out of the slide.
Lift it out slowly and keep control of it. It is under spring tension.
Step 11. Lift the barrel by the locking cams, move it slightly toward the front of the slide, then lift it up and out toward the rear.
Once the recoil spring assembly is out, the barrel usually lifts out easily.
That's all you need for routine field stripping.
The GLOCK manual says not to further disassemble the pistol beyond this point unless the work is being done by a GLOCK-Certified Armorer.
Part 3: Reassembly
Step 12. Reinsert the barrel into the slide and seat it fully.
Set the front of the barrel into the slide first, then lower the rear into place.
Step 13. Reinstall the recoil spring assembly. Put the small end into the front of the slide, compress it slightly, and seat the large end in the second semi-circular notch on the barrel locking cams.
That second notch matters. The rear end of the spring assembly should look centered and stable, not crooked or half-seated. If the recoil spring assembly is not seated correctly, the pistol may not cycle correctly.
Step 14. Place the slide on the frame rails and push it straight to the rear until it snaps into place.
You do not need to pull the slide lock down for reassembly. Just line the slide up with the frame rails and push it straight back.
Part 4: Quick Inspection
After reassembly, the manual recommends a basic inspection. With the pistol still unloaded, do these three checks:
- Trigger safety test. Cycle the slide to reset the trigger, then try to pull the trigger by pressing on the sides of it without depressing the center trigger safety. The trigger should not move rearward and the pistol should not dry fire.
- Trigger reset test. Pull the trigger and hold it to the rear. Rack the slide, then slowly release the trigger. It should reset forward with a noticeable click.
- Slide lock-open test. Insert an empty magazine and pull the slide fully to the rear. The slide should lock open.
That's it. Once you understand the order, a Glock 19 field strip is straightforward. For most beginners, the entire process gets easy as soon as two things click: the chamber check must happen before the trigger press, and the slide only moves back a tiny amount before you pull down the slide lock.
Keep the official manual handy for factory diagrams and model-specific details: GLOCK downloadable materials.
How many rounds do you have on your Glock 19?
Your Glock 19 is due for a new recoil spring assembly every 5,000 rounds — but that interval is only useful if you actually know how many rounds you've put through the pistol.
If you don't replace the recoil spring on time, the gun can start jamming, not fully closing after a shot, and wearing out parts faster.
Log each practice session in RangeReady and the app keeps a running round count for every firearm you own. When your Glock 19 is approaching 5,000 rounds you'll know it's time to plan the recoil spring assembly replacement — and the same approach works for cleanings and any other wear-part interval you care about.
Download RangeReady to start tracking round counts and maintenance for your Glock 19. Available on the App Store and Google Play:
Keep reading
How to Field Strip a SIG P365 (Disassembly & Reassembly Guide)
Step-by-step beginner's guide to field strip the SIG Sauer P365: takedown, disassembly, and reassembly. The same steps apply to the P365X and P365 XL.
How to Clean & Lubricate a Glock 19
A concise beginner-friendly guide to cleaning and lubricating a Glock 19 after field stripping it, based on the GLOCK owner manual.