UPK-D4 Eclipse M-LOK Eclipse SPARTAN SS

the Spartan M-LOK Direct Mount Bayonet

This UPK-D4 Eclipse M-LOK Direct has a Blade made of 14C28N Hardened Stainless Steel and a Direct to M-LOK Mount Base made of Type III Hardcoat 7075-T6 Aluminum

• Blade has a triangular cross-section for improved off-axis loading
• Blood Groove- The functional slot enhances fluid drainage when piercing fluid cavities
• Retractable Bayonet Defensive Implement
• The Eclipse Offers Self-sheathing when retracted
• Retractable Blade automatically Locks at either position (open/closed)
• Options: Unsharpened, or Fully Double-Edged (A knife having dual effective cutting edges)

What’s included?

x1 UPK-D4 Eclipse M-LOK Spartan

•  Retractable blade and base
• 3x Screws, M-LOK interface, and M-LOK nuts

Material Specifications:

• Blade Milled from 14C28N Stainless Steel
  
  • 290ksi Tensile Strength
• M-LOK Direct Mount Base and interface Milled from 7075-T6 Aluminum
  • Hardcoat Type III Anodized
  • 80 ksi Tensile Strength
• M-LOK Screws
  • Black Oxide Alloy Steel(140ksi) HRC 39
• M-LOK Nuts
  • Block Oxide 440A Stainless Steel (220ksi) HRC 45
• Custom Button made in 7075-T6 Aluminum
  • Black, Crimson, Patriot Blue, OD-Green, or Gold Hardcoat Type III 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

Dimensions

• Extended length: 13.5 inches (343mm)
• Collapsed length: 9.2 inches (233mm)
• Closed Stickout from nearest M-Lok slot: Base Tip End to First M-LOK Screw(Center): 7.2 inches (183mm)
• Weight: 5.5 oz

Important Read:

14C28N Hardened Stainless Steel- chosen to provide the Ultimate Performance with high hardness with brutal toughness, this alloy and temper combination provide a robust strength and reliability that allow the blade to handle the worst abuse.

7075-T6 Tempered Aluminum is a lightweight aluminum with steel like strength, one of the strongest Aluminum alloys available with a tensile strength of 80ksi.  The Hardcoat Type III Anodize provides a resilient protective surface. for reference typical steel screws at a hardware store are typically rated 60ksi