How to Laser Engrave Cerakote and Gun Slides: Fiber vs MOPA vs UV (and What It Costs)

Quick answer: For nearly every metal gun part, the right tool is a fiber laser, and for detailed slide work, black marks on anodized aluminum or color on stainless, a MOPA fiber laser is worth the upgrade. A standard 30W to 50W fiber such as the ComMarker B6 or Gweike G2 Max 50W removes Cerakote and marks steel and aluminum well. MOPA machines like the ComMarker B6 JPT MOPA, Haotian 60W JPT MOPA and ComMarker Titan 1 add pulse-width control for finer detail and cleaner deep engraving. A UV laser like the ComMarker Omni X is a niche tool here, mainly for polymer frames and plastic accessories. Having a slide engraved professionally typically costs $25 to $600 depending on size and depth. This guide covers how to do it yourself. If you are choosing a machine, start with our laser engravers for firearms collection.

Table of Contents

• Before You Start: Safety and the Law
• What the Laser Does to Each Gun Finish
• Three Ways to Laser Cerakote
• Fiber vs MOPA vs UV for Gun Engraving
• How to Laser Engrave a Gun Slide, Step by Step
• Dialing In Settings Without Ruining a Slide
• How Much Does Gun Laser Engraving Cost?
• Common Mistakes
• Which Laser Should You Use?
• Frequently Asked Questions

Before You Start: Safety and the Law

Never engrave an assembled or loaded firearm. Clear the weapon, confirm it is unloaded, and strip it to the part you are engraving: a slide off the frame, a lower without the upper, a barrel out of the gun. Remove optics, springs, guide rods and anything plastic or rubber that sits near the work area.

On the legal side, two federal rules shape every job:

• Required markings have minimum specs. Under 27 CFR 478.92, licensed manufacturers and importers must engrave the serial number and other required markings to a minimum depth of .003 inch, with the serial number in a print size no smaller than 1/16 inch. If you take on serialization or NFA marking work, your settings must reliably hit that depth.
• Never alter or obscure a serial number. Decorative work must stay clear of existing serial numbers and required markings. Obliterating or altering a serial number is a federal crime.

Whether you need a Federal Firearms License depends on the services you offer and how you handle customer firearms. Our guide to starting a gun engraving business covers licensing and compliance work in more depth. This article focuses on the hands-on technique.

What the Laser Does to Each Gun Finish

"Engraving a gun" really means one of several different processes, depending on the finish underneath. Identify the finish first, because it decides the laser, the settings and what the result will look like.

A note on nitrided slides: engraving through a nitride or black-oxide layer exposes bare steel that does not have the same corrosion resistance as the factory finish. Oil the engraved area after cleaning, or plan to refinish (Cerakote is the usual choice) if the gun will see wet conditions.

Three Ways to Laser Cerakote

Cerakote's own laser guidance describes three distinct effects, and knowing which one you want is the first decision on every Cerakote job. Cerakote recommends a 20–60W fiber laser for its laser imaging process.

1. Remove the coating to reveal the metal

The most common look: the laser ablates the Cerakote and leaves bright metal underneath, so the design reads as silver on a colored gun. It is fast, high-contrast and works on almost any Cerakote color. Take care to stop at the substrate if you want a clean metal finish rather than a deep engraving.

2. Remove a top coat to reveal a base coat

Coat the part in two colors (for example, a bright base under a dark top), then laser away only the top layer. The design appears in the base color, which opens up two-tone designs without masking. This takes careful, low-energy settings so you stop between layers.

3. Laser imaging: change the coating's tone without removing it

On suitable colors, low-energy passes shift the Cerakote's shade without cutting through, creating photographic, multi-tone images from a single coat. Cerakote publishes guidance on which colors respond best, and the process relies on a methodical test grid for your specific laser.

Color fill after engraving

Many shops also do the reverse: engrave into bare metal, then mask and coat so the engraved recess is filled with a contrasting Cerakote color. This is where combining a laser with Cerakote services raises the ticket size of each job.

Fiber vs MOPA vs UV for Gun Engraving

Standard (Q-switched) fiber

A standard fiber laser is the workhorse. It removes Cerakote, marks anodized aluminum white, cuts through nitride and engraves steel. Its pulse width is fixed, so it is a little less refined on very fine detail and on the cleanest possible deep engraving. For most first-time gun engravers, a 30W to 50W standard fiber covers 80% of jobs at the lowest price.

MOPA fiber

MOPA lets you change pulse width as well as frequency. In practice that means cleaner edges, better control on fine text and detail, dark or black marks on anodized aluminum, and true oxide colors on stainless. It is also more forgiving when you run deep engraving with many passes. Our deeper comparison of MOPA vs standard fiber explains the pulse physics, and our MOPA color settings guide covers color on stainless.

UV

UV lasers mark with very little heat, so they excel on polymer frames, magazines and plastic accessories where a fiber can melt or bubble the surface. UV is not a deep metal engraver, and Cerakote's own laser guidance is written around fiber lasers. Treat UV as a second machine for plastics, not a first machine for guns. Our comparison of UV vs IR lasers goes further.

If you want everything in one purchase, the Gun Engraving Bundle packages a MOPA fiber laser with the accessories a firearm shop needs.

How to Laser Engrave a Gun Slide, Step by Step

1. Strip and clean the part

Remove the slide from the frame and take out the barrel, recoil spring, guide rod and optic. Degrease the surface with isopropyl alcohol so oil does not smoke, discolor or block the beam.

2. Fixture it so it cannot move

A slide that shifts by a fraction of a millimeter ruins the job. Use a dedicated slide fixture or a machined jig that holds the slide flat for each side and the top. Round parts such as barrels, suppressor tubes and buffer tubes need a rotary attachment; see our lasers with rotary collection.

3. Set focus for the surface you are marking

Slides have flat flats, curved tops and serrations at different heights. Focus on the exact surface you are engraving and re-focus between faces. Your field lens also matters: a smaller lens gives a tighter spot and more energy density for detail. Our fiber lens size guide explains the trade-off.

4. Frame and align

Use the red-dot framing preview to trace the design's outline on the part. On slides, align to a straight edge such as the slide rail or the top flat, not to the serrations.

5. Test on scrap first

Run your test grid on a scrap part with the same finish. A used slide, an old lower or an offcut with the same coating is worth its weight in ruined customer parts.

6. Engrave in passes, with cleaning passes for depth

For Cerakote removal, one or two fast passes are often enough. For deep engraving on steel, use multiple passes with a cleaning pass between depth passes to clear melted debris so each layer cuts cleanly.

7. Clean, inspect and protect

Brush and wipe the part, inspect the depth and edges under magnification, then oil any exposed steel. For compliance markings, measure depth before the part goes back to the customer.

Dialing In Settings Without Ruining a Slide

Gun parts vary too much in alloy, coating thickness and heat treatment for any single setting to be reliable. What works is a systematic test grid on matching scrap, changing one variable at a time:

• Speed and power control how much energy lands per area. Start fast and low on coatings, then step up.
• Frequency controls pulse spacing. Higher frequency gives smoother, shallower removal; lower frequency hits harder per pulse for depth.
• Pulse width (MOPA only) controls how sharply each pulse hits. Short pulses help with fine detail, dark marks on anodized aluminum and clean edges.
• Hatch spacing and angle control fill quality. Cross-hatching at alternating angles produces a more even floor on deep engravings.
• Passes build depth. Count passes rather than cranking power, which overheats thin features.

Keep a log of each finish, part and result. Based on the calls our team fields every week, the shops that ramp fastest are the ones with a written settings library by finish, not the ones with the most powerful laser. For general metal starting points, see our fiber laser metal settings guide, and for power selection, our fiber laser wattage guide.

Lasering coatings and metals produces fine particulates and fumes, so run a fume extractor such as the Filtrabox Micro and wear laser safety glasses rated for your wavelength whenever the enclosure is open.

How Much Does Gun Laser Engraving Cost?

Paying a shop to engrave your gun

Published price lists from US gun engraving shops show a wide spread, driven mostly by coverage area, depth and laser time:

Some shops instead charge an hourly laser rate (around $75 per hour is one published example) plus artwork fees for custom designs.

Doing it yourself: equipment cost

A realistic in-house setup is a fiber laser plus fume extraction plus fixtures. As a rough guide using current Maker's Chest pricing: a standard fiber like the ComMarker B6 starts at $1,549, a MOPA like the B6 JPT MOPA is $2,549, and a Filtrabox Micro fume extractor is $1,995, so a capable MOPA setup lands around $4,500 before fixtures and software. At an average of $150 per slide job, that pays back in roughly 30 jobs. Your own numbers will depend on your pricing and volume; our guide on how much to charge for laser engraving walks through the pricing formula.

Common Mistakes

• Skipping the scrap test. Coatings and heat treatments vary by manufacturer and even by batch.
• Cranking power for depth. More passes at controlled power give cleaner floors than one brutal pass.
• Loose fixturing. The most common cause of doubled or smeared designs.
• Engraving near serial numbers. Keep decorative work well clear of required markings.
• Leaving bare steel unprotected. Oil or refinish anything you cut through nitride or oxide.
• Using a CO2 or diode laser on bare metal. Neither engraves hardened steel properly.

Which Laser Should You Use?

Choose a standard fiber laser if you mainly remove Cerakote, mark anodized lowers in white, and do text and logos on slides, and you want the lowest cost of entry.

Choose a MOPA fiber laser if you plan to offer detailed slide art, deep engraving, black marks on anodized aluminum or color on stainless, or you are building a business where finish quality sets your price.

Choose a UV laser as a second machine if you regularly mark polymer frames, magazines and plastic accessories and want clean marks without melting.

Based on our experience selling laser engravers to businesses of all sizes, most gun engravers who plan to charge for their work end up on MOPA, because it handles the widest range of finishes at a quality customers will pay for.

Frequently Asked Questions

Can you laser engrave Cerakote?

Yes. A fiber laser can remove Cerakote to reveal the metal, remove a top coat to reveal a base coat, or shift the coating's tone without cutting through it. Cerakote recommends a 20–60W fiber laser for its laser imaging process.

What laser do I need to engrave a gun slide?

A fiber laser. A 30W to 50W standard fiber handles text, logos and Cerakote removal. A MOPA fiber laser adds finer detail, cleaner deep engraving and color or dark marks on suitable metals.

How much does it cost to laser engrave a gun?

Published shop prices range from about $25–$50 for a simple mark to roughly $275–$600 for full-coverage deep slide engraving. NFA markings typically run about $50–$75.

How deep do serial number engravings need to be?

Under 27 CFR 478.92, licensed manufacturers and importers must engrave serial numbers and required markings to a minimum depth of .003 inch, with serial numbers no smaller than 1/16 inch. Check current ATF rules before taking on compliance work.

Can a UV laser engrave Cerakote?

A UV laser can mark some coatings, but it is not the standard tool for Cerakote. Cerakote's laser guidance is written around fiber lasers. UV is best for polymer frames and plastic accessories.

Does laser engraving damage a nitrided slide?

Engraving cuts through the nitride layer and exposes bare steel, which is less corrosion resistant than the factory finish. Oil the engraved area or refinish the slide if it will be exposed to moisture.

Can I engrave an AR-15 lower with a fiber laser?

Yes. Anodized aluminum lowers are among the easiest gun parts to engrave. A standard fiber produces a bright white mark, and a MOPA can also produce darker marks.

Planning to engrave firearms in-house? Contact our team and we will help you match a fiber or MOPA laser, fixtures and fume extraction to the finishes you work on most.

Engraving slides and lowers?

ComMarker B6 JPT MOPA Fiber Laser Engraver

A compact MOPA fiber laser with pulse-width control for detailed slide work, deep engraving and dark marks on anodized aluminum.

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Written By

Alina Oprea

Maker & Equipment Specialist

Alina Oprea is a hands-on maker, jeweler, and workshop specialist at The Maker’s Chest, with 25 years of silversmithing experience alongside a background in woodworking, renovations, construction, and commercial ductwork installation.

Her experience spans decorative woodwork, hand-carved doors, jewelry fabrication, homebuilding with Habitat, and real jobsite problem-solving — giving her a practical understanding of materials, tools, workflow, and what machines need to deliver beyond the spec sheet.