Pro-Tech TR-5 Operator T503-Operator shown open on a sandy concrete surface from a slightly elevated angle. The sterile DLC black blade is deployed, and the all-black aluminum handle, black hardware, and black deep-carry clip are fully visible with no identifying markings anywhere on the knife.

Pro-Tech TR-5 Operator T503-Operator shown closed on a sandy concrete surface, displaying the clip side of the knife. The black deep-carry tip-up pocket clip, black aluminum handle, and slide safety are visible, with the sterile no-markings build apparent from this angle.

Pro-Tech TR-5 Tactical Response 5 Operator Edition T503-Operator — 3.25" Sterile DLC Black CPM-S35VN, Black Aluminum, Tritium Push Button

SKU: T503-Operator-N

Pro-Tech Knives

$400.00 $315.00

(You save $85.00)

Overview
Warranty Information
Specifications

Product Description

The Pro-Tech TR-5 Operator Edition T503-Operator is a fully sterile push-button automatic built for those who need a deployable knife that carries no identifiers. No Pro-Tech logo. No blade etch. No markings anywhere on the knife or hardware.

The 3.25-inch CPM-S35VN drop point blade wears a matte DLC black finish that eliminates both glare and reflection. At 0.125 inches thick with a plain edge, it's built for clean, purposeful cutting — not showmanship. The machined black aluminum handle runs 4.375 inches closed and 7.625 inches overall, with all hardware finished in matching black DLC. The deep-carry tip-up pocket clip disappears in the pocket.

The single break from the sterile-black build is deliberate: a tritium push button. The self-illuminating tritium vial requires no batteries, no activation, and no ambient light. It glows continuously for years, letting the operator locate and deploy the knife in complete darkness without breaking light discipline. A slide safety locks out the button for secure carry.

The TR-5 platform has been one of Pro-Tech's workhorses since its introduction — a larger-format automatic with a refined single-action mechanism that locks up fast and firm. This Operator Edition takes the same proven platform and removes every feature that isn't functional. Built in Placentia, California by Pro-Tech Knives. Ships same or next business day from Knifeworks.

• Blade: 3.25-inch CPM-S35VN drop point — DLC black finish, fully sterile (no markings, no etch, no logo), plain edge, 0.125-inch thick

• Handle: Machined black aluminum — fully sterile, no logos or identifying marks, deep-carry tip-up pocket clip included

• Deployment: Push-button automatic with slide safety — single-action mechanism, fast and authoritative lockup

• Button: Tritium inlay — self-illuminating vial that glows in complete darkness without batteries or activation

• Dimensions: 7.625 in overall · 4.375 in closed · 3.5 oz

• Hardware: All-black DLC throughout — blade, clip, and fasteners maintain the sterile zero-signature profile

• Origin: Designed, engineered, and hand-finished in Placentia, California by Pro-Tech Knives

Warranty Information

Pro-Tech Knives warrants this knife to the original owner to be free from defects in materials and craftsmanship. Coverage includes replacement parts and labor only. Not covered: normal wear and tear, neglect, misuse or abuse, improper maintenance, blade finishes or coatings worn by normal use, damage from improper disassembly, or non-factory modifications. All knives returned for warranty consideration must include $15 for return handling and postage and a completed service request form. For warranty service, contact Pro-Tech Knives directly at protechknives.com.

Specifications

...

Product Type	Automatic
Product Brand	Pro-Tech Knives
Item Number	T503-Operator
Model	TR-5 Operator
Overall Length	7.625 in
Closed Length	4.375 in
Blade Length	3.25 in
Blade Thickness	0.125 in
Blade Material	CPM-S35VN
Blade Finish	DLC Black
Blade Style	Drop Point
Blade Edge	Plain
Handle Material	Aluminum
Handle Color	Black
Lock Type	Button Lock
Opener	Push Button
Clip Position	Tip-Up
Weight	3.5 oz
Origin	USA
Blade Range	3-3.49

Product Videos

Custom Field

Product Type Automatic

Product Brand Pro-Tech Knives

Item Number T503-Operator

Model TR-5 Operator

Overall Length 7.625 in

Closed Length 4.375 in

Blade Length 3.25 in

Blade Thickness 0.125 in

Blade Material CPM-S35VN

Blade Finish DLC Black

Blade Style Drop Point

Blade Edge Plain

Handle Material Aluminum

Handle Color Black

Lock Type Button Lock

Opener Push Button

Clip Position Tip-Up

Weight 3.5 oz

Origin USA

Blade Range 3-3.49

Product Reviews

⬤

Fully Sterile — Zero Signature ProfileNo logo. No etch. No markings on blade, handle, or hardware. Every surface DLC black matte — no glare, no reflection.

⚐

Tritium Button — Deploys in Complete DarknessSelf-illuminating tritium vial requires no batteries, no activation, no ambient light. Continuous glow for years.

⚔

CPM-S35VN — Field-Grade Edge SteelCrucible's benchmark powder-metallurgy stainless. Sustained edge retention, corrosion-resistant, sharpenable in the field on standard media.

USA Made — Authorized DealerHand-finished in Placentia, California. Pro-Tech Limited Lifetime Warranty. Ships same or next business day — call 888-225-9775.

Frequently Asked Questions

What makes the Pro-Tech TR-5 Operator Edition different from a standard TR-5?

The T503-Operator is a fully sterile configuration — no Pro-Tech logo, no blade etch, and no identifying marks anywhere on the knife. The only feature that breaks the all-black profile is the tritium push button, a self-illuminating vial that glows in darkness without batteries. Standard TR-5 models carry branding and logo etchings; the Operator Edition removes everything that isn't functional.

What is CPM-S35VN and why is it used on the TR-5 Operator?

CPM-S35VN is a Crucible Particle Metallurgy stainless steel formulated for a balanced combination of edge retention, toughness, and corrosion resistance. It holds a working edge longer than 154CM or AUS-8 while remaining significantly easier to sharpen than M390 or CTS-204P. For an automatic carry knife that may see demanding daily use, CPM-S35VN is a practical choice that doesn't require exotic sharpening equipment.

How does the tritium push button work?

Tritium is a radioactive isotope of hydrogen that emits low-level beta radiation, causing a phosphor coating inside a sealed glass vial to glow continuously. The vial is inlaid into the push button of the T503-Operator, making the button visible in complete darkness without any external light source, charging, or batteries. Tritium vials have a half-life of approximately 12 years, so the glow gradually dims over time but remains functional for many years of carry.

What does the slide safety on the TR-5 Operator do?

The slide safety is a physical lock that blocks the push button from being depressed. With the safety engaged, the knife cannot be deployed even under pressure. This is the standard carry configuration for push-button automatics — safety on in the pocket, disengaged when the knife needs to be used. The TR-5 Operator's slide safety sits on the handle spine and can be operated with the thumb.

Is the Pro-Tech TR-5 Operator T503-Operator legal to carry?

The T503-Operator is a push-button automatic (switchblade), and automatic knife laws vary significantly by state and municipality. Many states permit ownership but restrict carry in public. Federal law prohibits interstate transport of automatic knives with blades over 1.8 inches in certain circumstances. It is the buyer's responsibility to verify the laws in their state, city, and any jurisdiction they plan to carry before purchasing. Knifeworks does not provide legal advice on knife carry laws.

Where is the Pro-Tech TR-5 Operator made?

The TR-5 Operator T503-Operator is designed, engineered, and hand-finished in Placentia, California by Pro-Tech Knives. Pro-Tech has been manufacturing American-made automatic knives in California since 1999, hand-fitting and finishing each knife individually in small batches.