Microtech Ultratech Gen III ZBP S/E OTF Knife Black Aluminum, Apocalyptic M390MK by Tony Marfione (1121-10AP)

Microtech Ultratech Gen III ZBP S/E Black Aluminum OTF Knife, Apocalyptic M390MK by Tony Marfione (1121-10AP)

The Microtech Ultratech Gen III ZBP 1121-10AP is an OTF automatic knife featuring a Drop Point blade made of Böhler M390MK steel and a black aluminum handle. The Apocalyptic finish gives the blade a rugged, intentionally weathered look, while the ZBP mechanism reduces blade play after deployment.

The Double Action OTF mechanism allows the blade to be automatically extended and retracted using a slide. Generation III utilizes the Dual-Fuel Drive Train system and the Crud Kutter feature, which support smooth operation of the mechanism and minimize the impact of fine debris.

Böhler M390MK – steel developed for Microtech

The blade is made of Böhler M390MK steel, a special grade of M390 developed for Microtech in collaboration with Böhler. The material offers high resistance to corrosion and abrasion, as well as excellent edge retention.

Drop Point, flat grind, and Apocalyptic finish

The Drop Point profile provides a functional tip and versatile geometry for everyday use. The flat grind promotes efficient cutting, while the Apocalyptic finish gives the surface a distinctive, aged look.

Black aluminum handle and ZBP

The handle is made of 6061-T6 aluminum in black. The body is a monolithic construction, so it does not use a classic backspacer as a separate component.

The ZBP – Zero Blade Play system was developed to reduce the blade play characteristic of many OTF designs after the blade is extended. The blade extends and retracts automatically via a slider, and the Dual-Fuel Drive Train and Crud Kutter systems support the mechanism’s reliable operation.

Key Features at a Glance

• Böhler M390MK — a special variant of M390 developed for Microtech.
• Drop Point — a versatile profile with a functional tip.
• Flat grind — a geometry that ensures good cutting performance.
• Apocalyptic finish — a distinctive, intentionally aged look for the blade.
• Black aluminum handle — body made of 6061-T6 aluminum.
• ZBP — a mechanism that limits blade play after it is extended.
• Double Action OTF — automatic deployment and retraction of the blade with a single slider.
• Dual-Fuel Drive Train — the drive system for the OTF mechanism.
• Crud Kutter — a feature that supports the mechanism’s operation in the presence of fine debris.
• Tip-down clip — can be switched to the right or left side.

Technical data

Frequently Asked Questions

How do I care for Böhler M390MK steel?

After use, it’s a good idea to clean the blade and dry it thoroughly. M390MK is highly corrosion-resistant, but periodically applying a thin layer of protective coating helps keep the surface in good condition.

At what angle should the Ultratech Gen III ZBP be sharpened?

A good starting point is approximately 15–20° per side, ideally while maintaining the factory edge geometry. With M390MK, it’s best to use high-performance abrasives.

What does ZBP stand for?

ZBP – Zero Blade Play is a design solution developed to reduce blade play after deployment, a characteristic common to many OTF automatic knives.

How does the Double Action OTF mechanism work?

Pushing the slider forward automatically extends the blade, while pulling it back automatically retracts the blade into the handle. Both actions are performed by the same mechanism.

How do you maintain the Ultratech Gen III mechanism?

The interior of the mechanism should be protected from excessive dust, sand, and other fine debris. Regular cleaning and the use of products suitable for OTF mechanisms help maintain the slider’s smooth operation.

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