{"product_id":"wolverine-mtw-castle-nut","title":"Wolverine MTW Castle Nut — Real-Steel Spec","description":"\u003cdiv style=\"background:#edfaf1;border-left:4px solid #27ae60;padding:12px 16px;border-radius:0 6px 6px 0;margin:0 0 16px;font-size:13px;\"\u003e\n\u003cstrong style=\"color:#1a6b3a;\"\u003eWolverine MTW Castle Nut — the small part that stops the back end of your rifle working loose.\u003c\/strong\u003e Real-steel grade, mil-spec thread pitch, and correct for every MTW variant.\u003c\/div\u003e\u003cp\u003eA castle nut is the least interesting component on a rifle right up until it fails. It locks the buffer tube to the lower receiver, and everything behind it — stock, sling plate, tank stock, recoil system — depends on that lockup staying tight. When it loosens you get wobble, and on an HPA build a shifting buffer tube can put strain on the air lines running through it.\u003c\/p\u003e\u003cp\u003eThe reason to use the genuine Wolverine part rather than a generic one is \u003cstrong\u003ethread pitch\u003c\/strong\u003e. The MTW series uses true mil-spec receiver threading, and a cheap airsoft castle nut cut to a slightly different pitch will bind, cross-thread or gall the receiver on the way in. Damaging the threads on a lower receiver is an expensive way to save a few pounds.\u003c\/p\u003e\u003cp\u003eIt is \u003cstrong\u003ehigh-grade steel\u003c\/strong\u003e rather than the cast zinc or soft alloy found on standard AEG hardware, so it takes the torque of a proper armourer's wrench without marring, stripping or deforming. Matte black oxide finish, and it drives with a \u003cstrong\u003estandard AR-15 \/ M4 armourer's wrench\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003eWorth having on the shelf if you build or rebuild MTWs. It is exactly the sort of part that goes missing during a strip, and the sort that stops a job dead when it does.\u003c\/p\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eSpecifications\u003c\/h2\u003e\u003ctable style=\"width:100%;border-collapse:collapse;font-size:13px;margin:0 0 18px;\"\u003e\n\u003ctr style=\"background:#1B3A6B;color:#fff;\"\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding:7px 12px;text-align:left;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eCastle nut, buffer tube retention\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eHigh-grade steel, real-steel spec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMatte black oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eThread\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMil-spec MTW receiver pitch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eTool interface\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eStandard AR-15 \/ M4 armourer's wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eCompatibility\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eAll MTW series — Billet, Forged, MTW-9, MTW-308, Gen-12 MTW Shotgun\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSupplied\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eOne castle nut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eWolverine Airsoft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eGood to know before you buy\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDo not overtighten the buffer tube.\u003c\/strong\u003e When threading it back into the lower receiver, stop before it goes past flush with the inside of the receiver — if it protrudes, the upper will not close, and on an HPA build you risk crushing the internal air lines.\u003c\/p\u003e\u003cp\u003eUse a dedicated \u003cstrong\u003eAR-15 armourer's wrench\u003c\/strong\u003e rather than pliers or a punch. The nut is hard enough to survive it; your receiver finish is not.\u003c\/p\u003e\u003cp\u003eIf you are running a heavy recoil system such as the QUAKE stock, a small drop of \u003cstrong\u003emedium-strength (blue) thread lock\u003c\/strong\u003e on the buffer tube threads is worth adding.\u003c\/p\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill a standard AEG castle nut work instead?\u003c\/strong\u003e\u003cbr\u003eNot safely. The MTW uses true mil-spec receiver threading, and generic airsoft nuts are often cut to a different pitch — they can bind or damage the receiver threads, which is a far more expensive problem than the nut.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich MTWs does it fit?\u003c\/strong\u003e\u003cbr\u003eAll of them: Billet, Forged, MTW-9, MTW-308 and the Gen-12 MTW shotgun.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a special tool?\u003c\/strong\u003e\u003cbr\u003eA standard AR-15 or M4 armourer's wrench. If you do not have one, we stock a castle nut wrench, and we are happy to do the work here instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy steel rather than alloy?\u003c\/strong\u003e\u003cbr\u003eCastle nuts get torqued hard and repeatedly. Cast zinc and soft alloy deform under a proper wrench; steel does not.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need thread lock?\u003c\/strong\u003e\u003cbr\u003eNot for normal use. Worth adding if you run a QUAKE recoil stock or anything that puts sustained vibration through the back end.\u003c\/p\u003e\u003cdiv style=\"background:#1B3A6B;color:#fff;padding:12px 16px;border-radius:6px;margin:18px 0 0;font-size:13px;\"\u003e\n\u003cstrong style=\"color:#fff;\"\u003e💡 Titan Forge Airsoft tip:\u003c\/strong\u003e you will want a \u003ca href=\"\/products\/gpt-airsoft-hook-castle-nut-wrench\" style=\"color:#cdd6f4;\"\u003ecastle nut wrench\u003c\/a\u003e to fit it properly. See our \u003ca href=\"\/collections\/mtw-article-parts\" style=\"color:#cdd6f4;\"\u003eMTW parts range\u003c\/a\u003e or all \u003ca href=\"\/collections\/hpa-spares-upgrade-parts\" style=\"color:#cdd6f4;\"\u003eHPA spares\u003c\/a\u003e. As an HPA tech centre we fit and align these in house — \u003ca href=\"https:\/\/wa.me\/447874452357\" style=\"color:#cdd6f4;\"\u003emessage us on WhatsApp\u003c\/a\u003e.\u003c\/div\u003e","brand":"Wolverine Airsoft","offers":[{"title":"Default Title","offer_id":55654292717944,"sku":"9898751115","price":9.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/WolverineMTWCastleNut_TitanForgeAirsoft.webp?v=1788953183","url":"https:\/\/www.titanforgeairsoft.com\/products\/wolverine-mtw-castle-nut","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}