{"product_id":"m240-hpa-gearbox-shell","title":"M240 HPA Gearbox Shell","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:af823a93-5b2d-410b-825c-e4dd80befe9c-14\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:af823a93-5b2d-410b-825c-e4dd80befe9c-14\" data-turn-id-container=\"request-WEB:af823a93-5b2d-410b-825c-e4dd80befe9c-14\" data-testid=\"conversation-turn-30\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"d9c4048b-968d-4450-a953-0ee3736b7a4f\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\"\u003e\n\u003ch1 data-start=\"0\" data-end=\"35\"\u003eBull Craft M240 HPA Gearbox Shell\u003c\/h1\u003e\n\u003cp data-start=\"37\" data-end=\"78\"\u003eDrop the dead weight. Keep the firepower.\u003c\/p\u003e\n\u003cp data-start=\"80\" data-end=\"480\"\u003eThe Bull Craft M240 HPA Gearbox Shell was engineered from the ground up as a purpose-built lightweight replacement for bulky stock gearbox systems. While the factory gearbox weighs approximately \u003cstrong data-start=\"275\" data-end=\"288\"\u003e1 lb 9 oz\u003c\/strong\u003e, the Bull Craft gearbox with a PolarStar engine installed weighs in at only \u003cstrong data-start=\"365\" data-end=\"373\"\u003e8 oz\u003c\/strong\u003e — dramatically reducing weight while improving alignment, wire management, and overall install simplicity.\u003c\/p\u003e\n\u003cp data-start=\"482\" data-end=\"746\"\u003eDesigned specifically for PolarStar and Wolverine HPA engine configurations, this gearbox uses an \u003cstrong data-start=\"580\" data-end=\"601\"\u003eM249 nozzle setup\u003c\/strong\u003e and was built with ample room for wiring, FCU routing, and clean internal organization without the cramped headaches of traditional conversions.\u003c\/p\u003e\n\u003cp data-start=\"748\" data-end=\"793\"\u003eNo shims. No fighting alignment. No guessing.\u003c\/p\u003e\n\u003cp data-start=\"795\" data-end=\"885\"\u003eJust a clean, lightweight HPA conversion built the way it should have been from the start.\u003c\/p\u003e\n\u003cp data-start=\"887\" data-end=\"924\"\u003e🔥 Built Different. Built Bull Craft.\u003c\/p\u003e\n\u003chr data-start=\"926\" data-end=\"929\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eOptional Add-On\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1126\" data-end=\"1158\"\u003e✔ Extended 14\" Grip Line Upgrade\u003c\/p\u003e\n\u003cp data-start=\"1160\" data-end=\"1284\"\u003eThe standard grip line measures approximately \u003cstrong data-start=\"1206\" data-end=\"1219\"\u003e10 inches\u003c\/strong\u003e, positioning the air adapter directly near the buffer tube area.\u003c\/p\u003e\n\u003cp data-start=\"1286\" data-end=\"1474\"\u003eFor builders wanting additional adjustment room, we also offer a \u003cstrong data-start=\"1351\" data-end=\"1379\"\u003e14-inch grip line option\u003c\/strong\u003e. Simply cut the line to your desired length, install your air fitting, and you’re ready to go.\u003c\/p\u003e\n\u003chr data-start=\"1476\" data-end=\"1479\"\u003e\n\u003ch1 data-start=\"1481\" data-end=\"1526\"\u003eComplete PolarStar Conversion Kit Available\u003c\/h1\u003e\n\u003cp data-start=\"1528\" data-end=\"1644\"\u003eFor customers performing a full HPA conversion, Bull Craft also offers a complete PolarStar setup package including:\u003c\/p\u003e\n\u003cp data-start=\"1646\" data-end=\"1731\"\u003e✔ Bull Craft Gearbox Shell\u003cbr data-start=\"1672\" data-end=\"1675\"\u003e✔ PolarStar Plug Board\u003cbr data-start=\"1697\" data-end=\"1700\"\u003e✔ Trigger Switch\u003cbr data-start=\"1716\" data-end=\"1719\"\u003e✔ JST Wire\u003c\/p\u003e\n\u003cp data-start=\"1733\" data-end=\"1791\"\u003eEverything needed for a cleaner, simpler conversion setup.\u003c\/p\u003e\n\u003chr data-start=\"1793\" data-end=\"1796\"\u003e\n\u003ch1 data-start=\"3147\" data-end=\"3164\"\u003e✅ Core Features\u003c\/h1\u003e\n\u003cp data-start=\"3166\" data-end=\"3735\"\u003e✔ Ultra-Lightweight Design — Only 8 oz with PolarStar engine installed\u003cbr data-start=\"3236\" data-end=\"3239\"\u003e✔ Massive Weight Reduction vs Stock Gearbox\u003cbr data-start=\"3282\" data-end=\"3285\"\u003e✔ Compatible with Wolverine Engine Configurations\u003cbr data-start=\"3438\" data-end=\"3441\"\u003e✔ No Shim Kit Required for engine installation\u003cbr data-start=\"3487\" data-end=\"3490\"\u003e✔ Spacious Wire Routing\u003cbr data-start=\"3522\" data-end=\"3525\"\u003e✔ Uses M249 Nozzle Configuration\u003cbr data-start=\"3681\" data-end=\"3684\"\u003e✔ SLS Nylon PA12 Construction\u003cbr data-start=\"3713\" data-end=\"3716\"\u003e✔ Made in the USA\u003c\/p\u003e\n\u003cp data-start=\"4423\" data-end=\"4500\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eBull Craft...Built Better.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!----\u003e","brand":"Bull Craft Industries","offers":[{"title":"Gearbox Only","offer_id":43639816618058,"sku":"046957263730","price":58.95,"currency_code":"USD","in_stock":true},{"title":"Gearbox + 14\" Grip Line","offer_id":43640005886026,"sku":"046953260603","price":60.95,"currency_code":"USD","in_stock":true},{"title":"Complete Kit: Gearbox + Plug Board, Trigger Switch, JST Wire","offer_id":43639816683594,"sku":"046959590636","price":87.95,"currency_code":"USD","in_stock":true},{"title":"Complete Kit: Gearbox + 14\" Grip Line + Plug Board","offer_id":43640005918794,"sku":"046954540537","price":93.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0571\/0440\/0458\/files\/IMG_2176.heic?v=1785504365","url":"https:\/\/bullcraftindustries.com\/products\/m240-hpa-gearbox-shell","provider":"Bull Craft Industries","version":"1.0","type":"link"}