Microtech Dirac Delta D/E OTF Knife Natural Clear Aluminum, Apocalyptic M390 by Tony Marfione (227-10APNC)
- Dirac Delta D/E Natural Clear Aluminum, Apocalyptic Larger version of the OTF automatic knife from the Dirac series. D/A mode, equipped with a fast blade ejection mechanism. Slider button on the side of the handle. Designed by Tony Marfione.

Dirac Delta D/E Natural Clear Aluminum, Apocalyptic is an enlarged OTF automatic knife from the Dirac series. It operates in D/A mode and is equipped with a hellishly fast blade ejection mechanism. The slider button is on the side of the handle. 100% made and assembled in the USA. Designed by Anthony Marfione, knifemaker and owner of Microtech Knives.
Dirac® Delta - an enlarged version of the first OTF Double Action automatic from Microtech with a slider in the handle. Modernized, ergonomic handle with curved lines similar to HALO®. This line features Microtechs® signature ultra high-end solutions such as patented screws, innovative inner mechanism and glass breaker. With a total length of 7.25 inches, the Dirac® is a perfect EDC (everyday carry) knife.
M390 Microclean® - martensitic high-performance chrome steel produced using powder metallurgy. Due to the alloy concept, it is characterized by extremely high wear resistance and high corrosion resistance. Thanks to its high wear resistance, it retains its edge shape, keeping the blade sharp for a very long time (requires minimal maintenance). Another advantage is its resistance to “wire” formation during sharpening. Steel with a high chromium content of 20.0% (Cr) and an admixture of 1.9% carbon (C), 4.0% vanadium (V), hardened to 59-61 HRC. This super steel is comparable to Carpenter's CPM 20CV or CTS-204P steels. Manufactured by Böhler Edelstahl in Kapfenberg, Austria.
Blade - machine-ground Dagger D/E (Double Edge), sharpened on both sides. Finished with an eye-catching Apocalyptic patina. The blade is finished with a high flat grind, which ensures excellent cutting properties. This gives the knife excellent piercing properties while maintaining high strength. The centrally placed grain reinforces the blade. The strong blade retraction / extension mechanism with a knurled thumb slide, a stepped slider for the thumb, requires a certain amount of force to overcome the resistance of the spring for safety. The opening mechanism allows for a smooth opening for both right- and left-handed users.
Handle - made with high precision in 3D technology on CNC milling machines, from brushed and polished aluminum 6061-T6. The surface texture of the handle ensures that the knife does not slip in the hand during use. There are jimping on the back and bottom of the handle for a more secure grip. The slider is characteristically placed in a milled depression on the side of the handle. This allows the hand to rest more naturally when opening and closing the knife. The slim profile and milled two-position (right/left) solid deep carry clip allow the knife to be carried discreetly in the pocket in a tip-down position (with the tip of the blade facing down). The clip features the Microtech logo, serial number and date of manufacture. The handle ends in a window-breaking mallet, a solid steel triangle with a pressed-in tungsten carbide ball.
Technical data:
Product number: 227-10APNC
Product name: Dirac Delta® D/E Natural Clear Aluminum, Apocalyptic
Overall length: 235.0 mm / 9.25”
Blade length: 95.2 mm / 3.75”
Blade thickness: 3.0 mm / 0.12”
Handle length: 140.0 mm / 5.5”
Handle thickness: 12.7 mm / 0.5”
Weight: 129.0 g / 4.55 oz
Blade material: Böhler M390
Blade hardness: n/a
Blade grinding: Flat
Blade finish: Apocalyptic
Handle material: 6061-T6 Aluminum
Handle finish color: Natural Clear
Backspacer material: 6061-T6 Aluminum
Backspacer color: Natural Clear
Clip: Right / left, Tip-down
Clip material: Stainless Steel
Pivot mechanism: n/a
Lock: Slide Lock
Opening type: Automatic, push/pull Thumb slider
Additional accessories: None
Designer: Anthony Marfione
Brand: Microtech
Manufacturer: Microtech Knives
Country of origin: USA
Development: Sharg® company