Phase 7SDM - Non-Catalog Tony Marfione Jr. Collaboration - Hand Ground DLC/Mokuti


Blackside Customs Phase 7SDM — Ground and Hand Sharpened by TJ Marfione

The Blackside Customs Phase 7SDM (Size Does Matter) reaches a new level of refinement when ground and hand sharpened by legendary maker TJ Marfione. This collaboration brings Marfione’s world-class grinds and meticulous hand-finished edges to an already formidable design, creating a dagger that blends cutting-edge performance with unmistakable artistry. Each piece is further elevated with Mokuti handles that are precision-machined and hand-finished in-house by Blackside Customs.


The Blackside Customs Phase 7SDM is a premium fixed-blade dagger that lives up to its name — Size Does Matter. Measuring 9.25″ overall with a 4.5″ double-edged blade, it combines reach, strength, and refined handling in one bold design.

Materials & Craftsmanship

Crafted from high-performance MagnaCut steel (with select builds available in 154CM), the Phase 7SDM delivers exceptional edge retention and toughness. Each blade is finished in Cerakote, stonewash, or limited custom editions, making it as visually striking as it is functional. A milled fuller reduces weight while adding structural integrity and signature style.

Ergonomic Handle Design

The symmetrical G-10 handles provide a confident, ambidextrous grip. Custom milled hardware, jimping along the spine, and a lanyard hole add both utility and aesthetic refinement. With a blade thickness of 0.150″, the Phase 7SDM is built to perform without unnecessary bulk.

Ready for Carry or Collection

Each dagger includes a precision-molded Kydex sheath with the Blackside logo for secure retention and quick deployment. Whether carried in the field, mounted to gear, or displayed as part of a curated knife collection, the Phase 7SDM stands out as both a performer and a showpiece.