Proudly made in the USA.

FirstEdge® 5150-5155 Elite Field Knife with KYDEX Sheath

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Check out what American Handgunner has to say about the 5150 Field Knife!

The FirstEdge® 5150-5155 Elite Field Knife was designed in partnership with U.S. Elite Forces and is currently used in training and deployment. This is a very rugged and versatile knife that can be used for multiple applications, from Survival to Everyday Carry. The knives are made with ELMAX® Steel, a superior blade steel with extremely high wear resistance, superior corrosion resistance, high compressive strength, and excellent dimensional stability that retains size and form under heavy use. The FirstEdge® Elite Field Knife is equipped with a Kydex Tri-Composite Knife Sheath (patent pending).

SKU: 5150 Category:


  • Full Tang Fixed Blade
  • ELMAX® Stainless Steel Blade – .210” Thick
  • 5.525″ Blade Length
  • 11” Overall Length
  • Hardened to 60-61 HRC
  • 1.25 lb. Packaged Weight / 13.4 oz. Knife Only
  • Flat Ground blade
  • Coarse Textured Black, Green or Tan G-10 Handles
  • Striking Pommel
  • Lanyard Hole
  • Stainless Steel Hex Fasteners
  • Black Oxide Finish on Blade & Fasteners
  • Tri-Composite Kydex Sheath included

KYDEX Tri-Composite Sheath

The FirstEdge® Fixed Blade Tri-Composite Knife Sheath (patent pending) is constructed of precision-formed KYDEX® panels, with two hardened stainless steel liners in between. This design allows for disassembly, cleaning, and reassembly in minutes. The panels are fastened with hard-coated stainless steel Hex fasteners. Compartments and drain holes ensure moisture absorbance and sand grit retention is minimal. Knives snap securely into the KYDEX Sheath and are removed with positive thumb pressure, ensuring safe carry and rapid and safe deployment. The sheaths withstand hard conditions in the field.


  • Tri-Composite System (Patent Pending)
  • Molded KYDEX
  • 3” Nylon Webbing
  • Box “X” Stitching
  • Stainless Steel Hex Fasteners
  • Stainless Steel Sheath Liners


We are extremely proud of our products and sincerely value our customers. We want you to be 100% satisfied with your FirstEdge® experience.  Our Fixed Blade Knives are designed to withstand heavy, extreme use. If your knife fails, we will repair or replace it free of charge, no questions asked – Forever.  Our Folding Knives are tough and are designed for powerful, precision cutting.  If your folding knife fails to perform due to a defect and doesn’t meet your expectations, we will repair or replace your knife free of charge – Forever.  We don’t expect our knives to fail, but if this happens, we will take care of you.


FirstEdge® knives leave the factory razor-sharp.  It is important to maintain the sharpness of the blade, as a dull edge requires more force and poses a danger to the user.  The frequency and manner of use will determine how frequently the knife will need to be sharpened.  Periodic use of an Arkansas Honing Stone will remove burrs and maintain the edge of the blade.  Should the blade remain dull after use of a honing stone, professional sharpening is recommended.


Folding Knives – Remove moisture, dirt, and other impediments from blades, handles, and locking mechanisms after each use.  Cycling of the blade open and closed will assist in removing dust and foreign particles.  Compressed air may be used to dislodge foreign objects.  Periodic application of a light oil, such as WD-40®, Break-Free®, or mineral oil is recommended.  For optimal safety, Folding Knives should always be stored in the closed position.

Fixed Blade Knives – Remove moisture, dirt, and other impediments from sheaths after each use. Compressed air may be used to dislodge foreign objects.  Periodic application of a light oil, such as WD-40®, Break-Free®, or mineral oil is recommended.  For optimal safety, Fixed Blade knives should always be stored securely in their sheaths.


FirstEdge® is proud to offer ELMAX® Steel in our premium knife products. Produced by Bohler-Uddenholm of Sweden, ELMAX® is “High Chromium-Vanadium-Molybdenum” alloyed steel, made of 18% Chromium, 3% Vanadium, 1.7% Carbon, 1% Molybdenum, 0.8%Silicon, and 0.3% Manganese. This composition of metals results in a superior stainless steel alloy with high wear resistance, superior corrosion resistance, and high compressive strength. The ELMAX® advance powder metallurgy technology allows for these rare performance capabilities. The steel is hardened to 60-61 HRC, resulting in excellent edge retention and high impact resistance. It is easily sharpened and holds an edge as well as carbon steel alloy.

Comparative testing of ELMAX® versus other stainless steels show superior performance by ELMAX®. Other steels may perform in one aspect, but are weaker in others: tough but difficult to sharpen; sharp but prone to corrosion and rust; rust-resistant but a softer blade. ELMAX® performs without trade-offs. Using the industry standard, CATRA (Cutlery Allied Trades Research Association), Edge Retention Test, ELMAX® scored higher than other stainless steels at 62 HRC. In the TCC (Total Cards Cut) Test that measures the number of silica impregnated cards that a knife can cut at one time, ELMAX® placed second with 930.7. ELMAX® steel at 61 HRC performed better than other stainless blade steels, even those at 57 HRC, despite the fact that a lower HRC has been viewed as stronger.

ELMAX® steel is ideal for Survival, Outdoor and Underwater applications where high durability, toughness, and corrosion resistance are critical. ELMAX® knives withstand extended exposure to moisture, extreme temperature change, and constant heavy use. Other applications include Hunting, Fishing, and Food Service where sharpness and ease of sharpening and robustness are critical features.

Additional Information

Blade Type

Plain Edge 5150, Partial Serrated Edge 5155

Blade Finish

Black Oxide, Bead Blast

Handle Color

Black G-10, Green G-10, Tan G-10

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