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Making the Best Counterterrorism Knives:
"Ari B'Lilah" counterterrorism, combat knife, obverse side view in ATS-34 high molybdenum stainless steel blade, 304 stainless steel bolsters, G10 fiberglass/epoxy composite handle, hybrid tension-locking sheath in kydex, anodized aluminum, stainless steel, HULA, UBLX in polypropylene, polyester
"Ari B'Lilah"

IDF YAMAM "Ari"

"Ari" Tactical Combat Counter-Terrorism Knife, obverse side view in ATS-34 high molybdenum stainless steel blade, 304 stainless steel bolsters, G10 composite handle, tension-locking sheath of kydex, aluminum, stainless steel, titanium
"Ari" IDF YAMAM tactical combat, counter-terrorism knife with accessory package, fasteners, hardware and tools
Custom "Ari" Israeli Defense Force YAMAM Counter-Terrorism Tactical Combat Knife
  • Size: Length overall: 12.375" (31.4 cm), Blade Length: 6.0" (15.2 cm), Thickness: .201" (5.1 mm)
  • Weight: Knife: 1 lb., 2 oz. (510 grams), Sheath (with accessories: 1 lb. 6 oz. (624 grams)
  • Blade: ATS-34 High Molybdenum Martensitic Stainless Tool Steel, Hardened and Tempered to Rockwell C58, Media Blasted
  • Bolsters: 304 high nickel, high chromium austenitic stainless steel
  • Handle: G10 fiberglass/epoxy composite laminate
  • Sheath: Hybrid Tension-Locking in Black Kydex, Aluminum, Stainless Steel, Titanium
  • Knife: "Ari" is the Hebrew word for lion, and the lion is the sign of the tribe of Judah and Jerusalem and is even called the Lion of God. This is a knife custom made the most serious of action; Ari was designed with and for an Israeli YAMAM counter terrorism unit. Using their direct input and feedback, I've developed a series of knives specifically designed for tactical combat and defense in the field of counter terrorism. It's a great honor to have the input, guidance, and direction of these professionals, widely considered the most elite and effective counter-terrorism unit in the world. They requested a series of extremely efficient, well-designed and constructed, lethal combat knives with some special features, built to the highest standards in the world: what I'm known for in tactical combat knives, sheaths, and accessories.
    I made the blade of ATS-34, a high molybdenum and high chromium martensitic stainless tool steel, chosen for its extreme toughness and wear resistance, high durability, and high temperature resistance. The blade of the Ari is double-edged and differentially hollow ground; the main cutting edge is hollow ground with an 8" diameter wheel and the top edge with serrations is hollow ground with a 3" diameter wheel. This is very difficult to get right, and the purpose is to create two complimentary edges, both different in character and geometry, yielding extremely thin and razor keen edges with a high longevity while preserving a good cross-sectional thickness of spine to support thrusting and the point. Each cutting edge has its own function and design; the main edge supports an acute angle tanto point for lethal penetration with a long length of keen, sharp tool steel cutting edge. The top edge is designed with my Hammerhead serrations, which are extremely tough and aggressive, with reduced snagging and wide transitions between concavities and segmented edges. The blade is hardened and tempered to RC58 for maximum toughness (resistance to breakage) at high hardness (wear resistance). The grinds on the blade are accurate, sweeping, and with nicely radiused grind terminations for great transfer of energy without stressing the blade-to-handle ricasso area. The ricasso is kept very short, and is heavily reinforced with a substantial front bolster, sculpted, rounded, contoured, and finished in 304 stainless steel. This is the same steel used to make tough nuts, bolts, and fasteners; it's high in nickel and chromium, and is a zero-care stainless steel. The front bolster is contoured around a 1" (2.54 cm) diameter forward finger ring, which is rounded and radiused for comfort and smoothness. The finger ring offers maximum security between the hand and the knife, essential in the most critical of counter-terrorism offensives. The forefinger and thumb grip between the thumb rise and the finger ring, and this reinforced area is key to the control of the knife. The ring and thumb rise allow tremendous force to be applied to the blade where it is needed. The handle scales are G10, a fiberglass reinforced epoxy composite that is one of the most durable and dependable manmade handle materials on earth. The handle scales are dovetailed and locked and bedded under the bolsters, secured with heavy stainless steel pins. The handle shape is comfortable and extremely secure, with deep quillons, good belly, and slope for the heel of the hand that makes the knife an extension of the arm. The tang is fully fileworked with an accurate, tight staccato pattern for increased purchase and handmade signature. The tang is fully tapered, with plenty of thickness at the butt for a substantial stout talon (skull crusher or persuader) also applicable for non-lethal inducement. The heavy rear bolster is significantly mounted to the tang, and has a 5/16" through-tang lanyard hole for extra security when elevated or in special circumstances that require insurance against dropping the knife. The center of balance of the knife is between the first two fingers in forward grip, making the blade feel light and quick. The knife feels extremely solid and durable in forward grip; and in reverse grip, with the small finger threaded through the ring and the thumb over the heel with the tip at the talon, the knife feels robust and tough. The knife blade has simple embellishment: a deeply diamond-engraved mad lion graphic outline with the subtle yet powerful words: "The darkness for you is fear-for us it is daylight."
  • Sheath: The sheath is one of my hybrid tension-locking models, originally made for my skeletonized knives, but specially adapted to this fully bolstered and handled knife. This is a proprietary design, the best possible sheath of its type available in the world today. Actually, it is the ONLY type of this sheath available in the world today! The sheath is built of double thickness (.125" thick) kydex (methyl acrylate and polyvinyl chloride) over a welt-frame of 5052H32 corrosion resistant high strength aluminum alloy. The sheath is bonded with waterproof cement and bolted together with all 304 stainless steel Chicago screws for zero care and extreme corrosion resistance. The sheath (like most of my sheaths) has die-formed aluminum belt loops that are able to be moved to multiple locations as well as either side of the sheath frame. On this particular knife, the belt loops have 10 different locations with multiple combinations for versatile wear. The sheath is base around my hybrid tension-locking mechanism. This device is custom made to fit each knife, and allows a lock pressure of 15-20 pounds to hold the knife in the sheath, with an optional thumb or finger release. There are two options to unsheathe:
    1. placing your hand on the knife handle in forward (traditional) grip and use the finger or thumb to operate the release and unlock the knife for a controlled extraction of the knife.
    OR
    2. grabbing the knife handle and pulling hard, with at least 15-20 pounds of tension, the knife is unsheathed.

    Simply put, the knife can be unlocked manually, or yanked hard and unsheathed. 15-20 pounds is quite a bit of force, so the knife is locked into the sheath unless it encounters 15-20 pounds of pull. This means that in most circumstances, the knife stays locked in the sheath, and the assembly can trustfully be mounted upside down or used in highly active movement with relative security. To be certain that the knife is locked in the sheath properly, it takes a thumb operation to re-engage the locking mechanism. All of the components in this proprietary system are corrosion resistant stainless steel or titanium, and the entire assembly is even reversible by the owner. It's simple, it's lightweight, it's fast, and it's clean, and it's all non-glare.
  • Accessories: This is an example of my commitment to the entire knife experience, from design to working service, for some of the finest professional knife users in the world. Since the bolt pattern of the sheath matches my 2.5" bolt pattern for our accessories, most of my accessories can be used on this sheath, including any new ones I develop. At the request of the Unit, this knife comes with a full bunker of my attachment, wear, and useful accessories, including:
    Horizontal Belt Loop Plates (for horizontal belt or webbing wear)
    Flat mounting straps (for rigid clamping to webbing, belts, or gear in vertical or horizontal orientation)
    Sternum Harness Plus (for wearing the knife diagonally across the sternum, with full torso reinforcement straps)
    LIMA and Solitaire (Lamp Independent Mounting Assembly with Maglite Solitaire LED emergency back up light)
    HULA and MagTac (Holder, Universal, Lamp, Articulating, a fully functional main lamp with Maglite MagTac extreme intensity tactical flashlight)
    Lanyards (SCUBA rated and adjustable 550 cord)
    All necessary stainless steel hardware, fittings, fasteners and tools for mounting, moving, and adjusting

    This arrangement of useful and necessary accessories was requested because the Unit operates at night or in low-light situations, and requested a wide variety of wear options. My system for wear options allows the greatest flexibility, usefulness, and applications of any tactical combat knife in the world. See also the Aryeh, Ari-El, Shahal, Shahaz, Ari B' Lilah, Ari B' Lilah, Ari B' Lilah Predator, and Ari B' Lilah Commemorative in this YAMAM series.
  • Learn much more about my Counterterrorism Knives at this link.
  • This is an extreme use, highly engineered and meticulously developed tactical combat knife and weapon, one of the finest tactical combat weapons made in the world today, specifically made for the world's most elite counter-terrorism unit. It is a great honor for me to make these knives, respecting the very ancient and most crucial relationships between weapons maker and warrior. Special thanks to S. H., for his input, patience, and professionalism.

Thanks, S. H.!


Please click on thumbnail knife photos
"Ari" Counter-terrorism tactical combat knife, reverse side view. Sheath back shows die-formed high strength alumiunum belt loops, all stainless steel fittings and fasteners "Ari" spine edgework, filework detail. Tang is fully tapered, bolsters are dovetailed and G10 handle is locked and bedded to tang "Ari" inside handle tang view. Filework is full and stacatto, rear bolster reinforces talon and has through tang lanyard hole. Front bolster is contoured, smoothed sculpted, and radiused "Ari" obverse side handle detail. Knife is comfortable, solid, extremely well constructed for counter-terrorism use and durablity. Note rounded grind terminations, radiused forefinger ring "Ari" blade engraving detail. Deeply cut diamond engraving is permanent, subtle, yet powerful. Note sculpted front bolster around finger ring. "Ari" sheathed view. Sheath accessories can be located in many different position and orientations around sheath.

See other knives in this IDF YAMAM series: Aryeh, Ari-El, Shahal, Shahaz, Ari B' Lilah, Ari B' Lilah, Ari B' Lilah Predator, Ari B' Lilah Commemorative

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