SOG Pentagon XR Mk3 Folding Knife - 3.6 Inch Blade, Spear Point, Straight Edge - Color and Packaging Options

Item #: SOG-12-61-02-57-OPT
Brand: SOG
Item #: SOG-12-61-02-57-OPT
Brand: SOG
  • Spear point folding knife for self-defense and combat
  • Ergonomic and ambidextrous design
  • Patented XR opening and locking mechanism for one-handed operation
  • Extremely durable Cryo CTS XHP steel blade

SOG Pentagon XR Mk3 Folding Knife

3.6 Inch Blade, Spear Point, Straight Edge

The new SOG Pentagon XR folding knife was made by professionals and designed for professionals that deal with self-defense and combat situations. This knife has a straight-edged spear point blade with a heavy-duty tip for precise work. Its ambidextrous features and reversible clip ensures safe one-handed operation and custom carrying.

Heavy Duty Blade

The blade on the Pentagon XR is constructed from a cryogenically heat-treated steel and a high-carbon CTS XHP steel alloy. This ideal combination of steels provides protection from corrosion and wear while retaining its edge and sharpness with little to no maintenance.

Ambidextrous Design and XR Lock

This knife has SOG's patented XR opening and locking mechanism which allows for a smooth, one-handed opening motion by using the kick opener, thumb stud, or holding the XR lock and flipping out the blade. When fully open, it locks into place and can hold an amazing 1500 pounds of force. When closed, the blade locks back into place to prevent any accidental opening. The G10 handle and ambidextrous body design ensure a secure and comfortable grip during use for any user.


  • Folding knife with spear point blade - designed for self defense and combat
  • Patented XR locking mechanism and three different ways of opening
  • G10 ultra-grip handle for a secure and comfortable hold, even through extended use
  • Smooth ambidextrous opening - one-handed opening
  • Reversible clip mount for personalized carrying
  • Blade made from Cryo CTS XHP stainless steel for durability and longevity
  • Part of the MK3 family - designs based on feedback provided by users and professionals
  • Blade locking security when open and closed
  • Available in black or OD green

Technical Specifications:

  • Type of Knife: Folding Knife
  • Overall Length: 8.38" (212.85mm)
  • Closed Length: 4.77" (121.15mm)
  • Locking Mechanism: XR
  • Opening Mechanism: XR, Thumb Stud, Kick
  • Blade Length: 3.6" (91.44mm)
  • Blade Thickness: 0.12" (3.04mm)
  • Blade Shape: Spear Point
  • Edge Type: Straight Edge
  • Blade Steel Type: Cryo CTS XHP Steel
  • Blade Finish: Titanium Nitride
  • Handle Material: G10
  • Handle Color: Black or OD Green
  • Weight: 4.9oz (138.91g)
  • Packaging: Peg Box or Presentation Box
  • Made In: Taiwan
  • Models and SKUs:

  • Blackout - Peg Box: SOG-12-61-01-41
  • Blackout - Presentation Box: SOG-12-61-01-57
  • OD Green - Presentation Box: SOG-12-61-02-57
  • **Some Options Are No Longer Available
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