{"product_id":"b5-m4-multi-tasker-tool-blk","title":"B5 Systems M4 Multi-Tasker Tool – AR-15 Armorer's Wrench \u0026 Field Tool","description":"\u003cp\u003eThe B5 Systems M4 Multi-Tasker Tool is a compact armorer's wrench and field maintenance tool designed specifically for AR-15\/M4 platform rifles. This all-in-one tool handles common disassembly and adjustment tasks without requiring a full toolkit, making it practical for range bags, deployment kits, or home maintenance. The multi-tasker combines castle nut wrench, barrel nut wrench, and front sight adjustment tool in a single durable package.\u003c\/p\u003e\u003cp\u003eMachined from heat-treated steel with a black oxide finish, the tool resists corrosion and wear during field use. The ergonomic design provides leverage for torquing castle nuts and barrel nuts to proper spec. Compatible with mil-spec AR-15 components including standard buffer tube castle nuts, barrel nuts, and A2-style front sight posts. Compact profile fits easily in MOLLE pouches or range bags.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Function:\u003c\/strong\u003e AR-15\/M4 armorer's wrench\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Heat-treated steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black oxide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible With:\u003c\/strong\u003e Mil-spec AR-15 castle nuts, barrel nuts, front sight posts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeatures:\u003c\/strong\u003e Castle nut wrench, barrel nut wrench, front sight tool\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approximately 4 oz\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"B5 Systems","offers":[{"title":"Default Title","offer_id":47935460638975,"sku":"B5MTR-1395","price":23.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/0434\/3807\/files\/2855537.jpg?v=1766481776","url":"https:\/\/doublestackstore.com\/products\/b5-m4-multi-tasker-tool-blk","provider":"Double Stack Store","version":"1.0","type":"link"}