{"type":"firestarter.listing","listing":{"id":"lst_RHCWX3WZ","product_name":"Karsumba R - Phantom Grey","category":"Fixed Blades","description":"Introducing the Karsumba R, our version of the traditional Karambit knife featuring a curved blade and standard ring for ease of drawing and utility. Now in new SOF Series colors!\nThe Karsumba R is a traditional take on the karambit fighting knife. The addition of the handle ring allows for increased retention in knife fighting scenarios. Though original Karambit knives were much longer and originally intended for farming practices, the shortened fighting version has proven beneficial in the biomechanics of the blade allowing for stronger and more lethal cutting strokes. The karambit fighting knife is the perfect blade for self defense and tactical applications. \nThis blade is precision ground out of CPM M4 steel, giving it the desirable toughness and edge retention Toor Knives has become known for, and is strikingly lethal. CPM M4 is known for its corrosion resistance and edge retention which is supported by the Toor Knives heat treatment process, leaving this blade right at about 60 Rockwell hard. This blade sits at a little over 6.5” overall and is the perfect concealable self-defense blade.\nEach one is made here in San Diego, CA by our skilled manufacturing team and comes with a KYDEX® sheath.","images":["https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-PHANTOM_GREY-HERO.jpg?v=1738971657","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-LIFESTYLE-01.jpg?v=1746236906","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-PHANTOM_GREY-ALT.jpg?v=1746236831","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-PHANTOM_GREY-HAND_ALT.jpg?v=1746236831","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-PHANTOM_GREY-HAND.jpg?v=1746236831","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-PHANTOM_GREY-SHEATH.jpg?v=1746236906","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-LIFESTYLE-15_0189c7a7-67fc-4c92-8ee8-66f3092ad964.jpg?v=1746236906","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-LIFESTYLE-19.jpg?v=1746236906","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-LIFESTYLE-03.jpg?v=1746236906","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-LIFESTYLE-05.jpg?v=1746236906","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-LIFESTYLE-11.jpg?v=1746236900","https://cdn.shopify.com/s/files/1/1344/7131/files/KARSUMBA_R-LIFESTYLE-10.jpg?v=1746236900"],"price":315,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:46.167Z"},"share_url":"https://firestarter.network/l/lst_RHCWX3WZ","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_RHCWX3WZ' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Karsumba R - Phantom Grey' and a budget_max comfortably above $315.00 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}