Product Description
⚠️ Automatic knife: Automatic knives are restricted or prohibited in some states and municipalities. Verify the laws where you live and carry before ordering; see akti.org for current state-by-state information.
The Pro-Tech TR-4 (Tactical Response 4) T4106FMM is a full-size push-button automatic with a 4.00" black DLC MagnaMax drop point blade and a black 6061 aluminum handle in Pro-Tech's feather texture. A steel secondary safety switch locks out the button, and a built-in glass breaker adds emergency utility. It is designed, engineered, and built in Placentia, California.
MagnaMax is the blade steel Pro-Tech uses on this TR-4, which Pro-Tech selects for edge retention and toughness. The 4.00" drop point blade has a plain edge and a black Diamond-Like Carbon (DLC) finish for a non-reflective look, with a broad belly for slicing and a strong point for detail work.
- Blade: 4.00" MagnaMax drop point, plain edge, black DLC finish.
- Handle: Black feather-textured 6061 aluminum with a built-in glass breaker and blasted hardware; 5.25" closed, 5.3 oz.
- Deployment + Lock: Push-button automatic opening; the button locks the blade open, and a steel secondary safety switch locks out the button to help prevent accidental deployment.
- Carry: Long deep-carry pocket clip for tip-up, right-hand carry; 9.25" overall.
Ideal for: users in jurisdictions where automatic knives are legal who want a full-size auto with a manual safety; professionals who want a glass breaker built into their knife; and Pro-Tech collectors who want the TR-4 in a classic black colorway.
Glass breaker note: the built-in glass breaker is intended for lawful emergency use. Check your local laws regarding carry.
The Pro-Tech TR-4 Feather Black in black DLC MagnaMax (T4106FMM) ships same or next business day from Columbia, Louisiana, where legal.
Pro-Tech TR-4 Feather Black: Frequently Asked Questions
Answers to the most common questions about the Pro-Tech TR-4 Feather Black (T4106FMM).
Is the Pro-Tech TR-4 legal where I live?＋
It depends on your state and local laws. Automatic knives are restricted or prohibited in some states and municipalities, and rules for owning and carrying them differ. Buyers are responsible for knowing and following the laws where they live and carry. See akti.org for current state-by-state information before ordering.
How does the TR-4 open, lock, and stay safe?＋
The TR-4 is a push-button automatic. Pressing the button fires the blade open, and the button mechanism locks it in place. To close, press the button and fold the blade, keeping your fingers clear of the edge. A steel secondary safety switch locks out the button when engaged, which helps prevent accidental deployment in the pocket.
What is MagnaMax steel, and what does the black DLC finish do?＋
MagnaMax is the blade steel Pro-Tech uses on this TR-4, selected for edge retention and toughness. The black Diamond-Like Carbon (DLC) finish gives the blade a non-reflective look and adds a hard surface layer over the steel.
What is the glass breaker for?＋
The TR-4's handle includes a built-in glass breaker for emergency situations, such as breaking a vehicle window when other exits are blocked. It is intended for lawful emergency use. Check your local laws regarding carry.
What comes with the Pro-Tech TR-4 T4106FMM?＋
The T4106FMM ships as a knife with its long deep-carry pocket clip installed for tip-up, right-hand carry. It is knife only, with no sheath included. Packaging and included items are set by Pro-Tech and are subject to change.
Where is the TR-4 made, and what warranty covers it?＋
The TR-4 is designed, engineered, and built by Pro-Tech in Placentia, California. Pro-Tech backs its knives with a Limited Lifetime Warranty against defects in materials and craftsmanship, covering replacement parts and labor, with factory sharpening included with service and a return handling fee set by Pro-Tech. It does not cover normal wear and tear, misuse or abuse, natural handle materials, worn finishes, or non-factory modifications. Contact Pro-Tech at service@protechknives.com before sending a knife for warranty service. Knifeworks does not warranty this product independently.
MAGNAMAX · SAFETY SWITCH · MADE IN USA
A Full-Size Pro-Tech Automatic, Where Legal
A 5.3 oz push-button automatic with a black DLC MagnaMax blade, a steel safety switch, and a built-in glass breaker. Automatic knives are restricted in some areas; check akti.org and your local laws before ordering. Questions? Our team carries these knives daily. We ship same or next business day from Columbia, Louisiana.
Call 888-225-9775
Warranty Information
Pro-Tech Warranty: Pro-Tech backs every knife with a Limited Lifetime Warranty against defects in materials and craftsmanship, covering replacement parts and labor. A return handling fee set by Pro-Tech applies, and factory sharpening is included with service. The warranty does not cover normal wear and tear, misuse or abuse, natural handle materials, worn finishes, or non-factory modifications. Contact Pro-Tech at service@protechknives.com before sending a knife for warranty service. Knifeworks does not warranty this product independently.Specifications
| Product Type | Automatic | |
| Product Brand | Pro-Tech | |
| Product Name | TR-4 (Tactical Response 4) | |
| Item Number | T4106FMM | |
| Overall Length | 9.25 in | |
| Handle Length | 5.25 in | |
| Blade Length | 4.00 in | |
| Blade Steel | MagnaMax | |
| Blade Shape | Drop Point | |
| Blade Finish | Black DLC | |
| Edge Type | Plain Edge | |
| Handle Material | 6061 Aluminum | |
| Handle Finish | Feather Texture | |
| Handle Color | Black | |
| Hardware Finish | Blasted | |
| Lock Type | Button Auto with steel secondary safety switch | |
| Opener | Push-Button Automatic | |
| Glass Breaker | Yes | |
| Clip Position | Tip-up, Right-Hand Carry | |
| Clip Style | Long Deep Carry | |
| Included | Knife with pocket clip (Knife Only, no sheath) | |
| Weight | 5.3 oz | |
| Origin | USA (Placentia, California) | |
| Blade Range | 4-4.99 | |
| Legal Notice | ⚠️ Automatic knife. Restricted in some states and cities. Check local laws; see akti.org. |
