Microtech Dirac Delta D/E OTF Knife Champagne Aluminium, Burnt Bronze M390MK by Tony Marfione (227-1CG-C19)

Microtech Dirac Delta D/E Champagne Aluminum, Burnt Bronze M390MK by Tony Marfione (227-1CG-C19) is a full-size OTF D/A automatic knife with a D/E Dagger blade.

Microtech Dirac Delta – Full-Size OTF in Champagne and Burnt Bronze

Microtech Dirac Delta D/E Champagne Aluminum, Burnt Bronze M390MK by Tony Marfione (227-1CG-C19) is a full-size OTF automatic knife operating on the D/A system, designed as a larger and more robust version of the Dirac series. The design combines fast blade deployment and retraction with a side-mounted Thumb slider, making operation intuitive for both right- and left-handed users. The aluminum handle in Champagne gives the model an elegant, technical look.

The blade, made of Böhler M390MK steel with a D/E Dagger profile, a flat grind, and a Burnt Bronze finish, is designed for precise tip control, effective cutting, and high durability. The slim handle made of 6061-T6 aluminum, a right/left tip-down clip, and a glass breaker with a tungsten carbide ball reinforce the practical nature of the Dirac Delta model.

Böhler M390MK – Microtech’s powder steel for large OTFs

Böhler M390MK is a high-performance powder steel developed for Microtech in collaboration with Böhler, designed with a focus on wear resistance, corrosion resistance, and long-lasting sharpness. In the Dirac Delta model, this material performs well when cutting tape, foil, cardboard, cord, straps, and technical materials, where stable edge performance and predictable blade guidance are essential.

The Burnt Bronze finish gives the blade a distinctive, slightly subdued character and complements the Champagne handle well. This combination emphasizes the model’s collectible appeal without compromising the functionality typical of full-size Microtech OTF automatic knives.

D/E Dagger and flat grind – symmetry, precision, and control

The D/E Dagger profile features a double-edged blade with symmetrical geometry, designed for precise tip control and tasks requiring accuracy. Central grains on both sides of the blade reinforce the technical nature of the design and give the blade the classic silhouette of an OTF automatic knife.

The flat grind facilitates smooth cutting through materials while maintaining an optimal balance between cutting edge sharpness and durability. This geometry is well-suited to the purpose of a full-size OTF automatic knife, which is designed to combine speed, control, and high mechanical strength.

6061-T6 Aluminum and D/A OTF – Ergonomics, Speed, and Control

The handle, made of 6061-T6 aluminum, features a slim profile and the characteristic, slightly curved line of the Dirac series. The Champagne finish gives the design an elegant look, while the surface texture and jimping on the spine and underside enhance grip stability when operating the mechanism.

The D/A OTF system allows the blade to be extended and retracted with a single slider. The side-mounted Thumb slider operates within a recess in the Handle, facilitating pressure control and a natural hand position. The two-position deep-carry clip allows the knife to be carried in a tip-down position, and the glass breaker with a tungsten carbide ball expands the model’s functionality in emergency situations.

Why choose the Microtech Dirac Delta D/E Champagne Burnt Bronze?

The Microtech Dirac Delta D/E Champagne Aluminum is designed for users who expect a full-size OTF automatic knife with robust mechanics, refined ergonomics, and high-quality materials. The Böhler M390MK steel ensures long-lasting edge performance, the D/E Dagger profile supports precise tip control, and the D/A mechanism allows you to quickly deploy and retract the blade with one hand.

The handle, made of 6061-T6 aluminum, combines durability with a comfortable, slim shape, while the Burnt Bronze finish gives the blade a distinctive look. This is an OTF automatic knife for those who value speed, precision, Microtech’s technological aesthetics, and the more elegant Champagne color scheme.

Key Features at a Glance

• Böhler M390MK: high-performance powder steel.
• D/E Dagger: double-beveled blade with symmetrical geometry.
• Flat grind: smooth blade glide through material.
• Burnt Bronze: a distinctive, industrial-style blade finish.
• D/A OTF: automatic blade deployment and retraction via a slide mechanism.
• 6061-T6 Aluminum: a lightweight and rigid handle in Champagne color.
• Glass breaker: steel component with a tungsten carbide ball.

Technical data

Frequently Asked Questions

How do I care for and sharpen the Böhler M390MK steel in the Dirac Delta model?

Böhler M390MK steel should be cleaned and dried after use, especially after contact with moisture, sweat, or dirt. A diamond sharpener or CBN system works best for sharpening, as this powder steel with high wear resistance requires an effective abrasive.

How does the D/A OTF mechanism work in the Microtech Dirac Delta?

The D/A OTF mechanism allows you to extend and retract the blade by moving the same thumb slider. The blade moves back and forth along the handle’s axis, so the knife can be operated with one hand.

What makes the D/E Dagger profile unique?

The D/E Dagger features a double-edged blade with symmetrical geometry, designed for precise tip control. The central grain reinforces the blade’s construction and gives it a technical look.

Why is the slide on the Dirac Delta located on the side of the Handle?

The side-mounted Thumb slider allows for a more natural hand position when extending and retracting the blade. The recess around the slider helps control the pressure required to operate the mechanism.

What makes the Burnt Bronze finish stand out?

Burnt Bronze gives the blade a darker, subdued look with a technical feel. Combined with the Champagne handle, it creates an elegant, collector’s edition of a full-size OTF.

Does the Microtech Dirac Delta have a glass breaker?

Yes, the handle features a glass breaker with a tungsten carbide ball. This is a structural element of the knife that expands its functionality in emergency situations, but it is not listed as a separate accessory in the technical data.

Prepared by: Specialists at Sharg® company – Your expert in EDC and cutting tools