How to Install a Glock Back Plate

Replacing a Glock back plate is one of the simplest modifications you can make to your firearm. No gunsmith. No special tools. Under sixty seconds from stock to done.

Here's how.

What You're Replacing

The back plate (also called the slide cover plate) is the small metal piece on the rear of your Glock slide. It retains the firing pin assembly inside the slide. On a stock Glock, it's a plain black piece of stamped metal.

A Sacred Iron back plate is a drop-in replacement — same dimensions, same function, with a laser-engraved mark on the surface.

Compatibility

Sacred Iron back plates are compatible with most Glock models:

Gen 1-5: Glock 17, 19, 19X, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 45, 47

Subcompact: Glock 43, 43X, 48 (these use a slightly different plate — make sure to select the right model when ordering)

Not compatible with: Glock 42 (.380 ACP) — this model uses a unique smaller plate.

If you're unsure about your model, check the markings on the left side of your slide. The model number is stamped there.

Before You Start

Make sure your firearm is unloaded. Remove the magazine. Lock the slide back. Visually and physically inspect the chamber to confirm it's empty. Do this every time.

This is a cosmetic modification. You are not altering the function of your firearm. The back plate retains the firing pin assembly — the replacement plate performs the same function with the same fit.

Step-by-Step Installation

Step 1: Push down the firing pin spacer sleeve.

With the slide removed from the frame and pointed in a safe direction, use your thumb or a Glock tool to press down on the small piece visible just below the back plate. This is the firing pin spacer sleeve. Push it down about 1/8 inch — you'll feel it give.

Step 2: Slide the back plate down.

While holding the spacer sleeve down, push the back plate downward. It will slide off the rear of the slide. Some plates are snug and may need firm pressure. This is normal.

Step 3: Control the spring.

Once the back plate is removed, the firing pin spring and firing pin will want to come out. Keep your thumb over the rear of the slide to control them. Don't let the spring launch across the room — it happens to everyone at least once, but let's skip that step.

Step 4: Set aside the internal parts (in order).

Remove the firing pin spacer sleeve, the spring cups, and the firing pin. Lay them out in order so reassembly is obvious. There's no need to fully disassemble anything beyond what the back plate holds in.

Step 5: Reassemble with the new plate.

Insert the firing pin, spring cups, and spacer sleeve back into the slide in reverse order. Press down the spacer sleeve. Slide your new Sacred Iron back plate upward into position. You'll feel it click into place.

Step 6: Function check.

With the slide still off the frame, press down on the spacer sleeve to confirm the back plate is fully seated and locked. The plate should not move or rattle. Reassemble the slide onto the frame and perform a standard function check with an empty chamber.

That's it. Under sixty seconds once you've done it a couple of times.

Tips

If the plate is too tight: Some back plates have a very snug fit, especially on newer Glock generations. A tiny amount of lubrication on the rails can help it slide in. Don't force it — if it won't seat, confirm you have the right model variant.

If the plate is too loose: This shouldn't happen with a quality replacement plate manufactured to OEM tolerances. If it does, contact us — we'll make it right.

First time? Watch one video first. The process is genuinely simple, but seeing it done once removes all the uncertainty. Search "Glock back plate replacement" on YouTube — there are hundreds of walkthroughs.

Sacred Iron back plates are engraved to order and manufactured to OEM tolerances. Each piece is a drop-in replacement for your stock slide cover plate. Browse the marks.