UPK-D4 Hybrid Al-Poly

$54.95 $81.00

A minimal guard version of the Pocket Sai. The guards have been reduced to minimum amount of grip for blade retraction.

 This version of UPK-D4 Bayonet Style has a Black Hard-coat 7075-T6 Aluminum Blade and a Composite Polymer Handle

Hybrid AL-Poly (Trainer)- The combo of a Black Hard-coat 7075-T6 Aluminum blade with a Polymer handle provides a tough Trainer Bayonet for practice and training at a reduced cost. A blade made in 7075-T6 Aluminum makes a tough resilient blade made for tougher tasks then a Polymer blade. This combination is a notable upgrade from the Full Polymer trainer.

Material Specifications:

  • Blade Milled from 7075-T6 Aluminum
    • Hard-Coat Anodized Black
    • 70 ksi Tensile Strength
  • Handle made in POLYMER
    • 50% Glass-filled Nylon (gun frame material)
    • 9 ksi Tensile Strength
  • Custom Button made in Anodized Aluminum
    • 6061-T6 Aluminum with Red Anodize
  • Custom Screws made in 450 Stainless steel
    • Heat Treated by Age Hardening to the H900 condition HRC 45
  • 301 Stainless Steel Springs
    • Cold work Hardened to a Spring Temper


  • Extended length: 11.7 inches (297 mm)
  • Collapsed length: 7.3 inches (186 mm)
  • Weight: 2.2 oz.