{"product_id":"shs-bore-up-nozzle-m4-21-4mm","title":"SHS Bore Up Nozzle — M4, 21.4mm","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;\"\u003eSHS Bore Up Nozzle for M4 Builds — the wider bore, for an M4 running a bore-up cylinder.\u003c\/strong\u003e Not a standard M4 nozzle.\n\u003c\/div\u003e\n\u003cp\u003eFitting a bore-up cylinder changes the volume of air the gearbox moves, and the nozzle has to be able to pass it. A standard nozzle becomes the restriction in that chain.\u003c\/p\u003e\n\u003cp\u003eThis is the M4 nozzle opened out to suit, at 21.4mm long. The length matches the platform; what differs from the standard part is the bore through the middle.\u003c\/p\u003e\n\u003cp\u003eBore-up is a matched conversion rather than a single upgrade. Cylinder, cylinder head, piston head and nozzle all want to be specified together or the extra volume goes nowhere useful.\u003c\/p\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eSpecifications\u003c\/h2\u003e\n\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;\"\u003ePart\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eAir nozzle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003ePlatform\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eM4 and M16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eLength\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e21.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eBore\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eBore-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSHS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSold as\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSingle nozzle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eGood to know before you buy\u003c\/h2\u003e\n\u003cp\u003eLength alone will not tell you what you already have. M4 nozzles commonly sit around this figure whether they are bore-up or standard, so the bore is what distinguishes them and it is worth checking before ordering.\u003c\/p\u003e\n\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need this if I have not fitted a bore-up cylinder?\u003c\/strong\u003e \u003cbr\u003eNo. On a standard cylinder it gives you nothing, and the standard M4 nozzle is the correct part.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the length different from a standard M4 nozzle?\u003c\/strong\u003e \u003cbr\u003eThe length is the same at 21.4mm. It is the internal bore that differs, which is what lets the extra air through.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it come with an o-ring?\u003c\/strong\u003e \u003cbr\u003eOur supplier does not state one, so keep the seal off your old nozzle until this one is in front of you.\u003c\/p\u003e\n\u003cdiv style=\"background:#fffbe6;border-left:4px solid #f0d060;padding:12px 16px;border-radius:0 6px 6px 0;margin:0 0 16px;font-size:13px;\"\u003e\n⚠ \u003cstrong\u003eBore-up is a set of parts, not one:\u003c\/strong\u003e a bore-up nozzle on a standard cylinder achieves nothing, and a standard nozzle on a bore-up cylinder throttles the whole conversion you paid for.\n\u003c\/div\u003e\n\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 Write down what is already in the gearbox before ordering any of it. Bore-up builds go wrong most often because one part in the chain stayed standard. Browse \u003ca href=\"\/collections\/gearbox-parts\" style=\"color:#cdd6f4;\"\u003egearbox parts\u003c\/a\u003e.\n\u003c\/div\u003e","brand":"SHS","offers":[{"title":"Default Title","offer_id":55677912252792,"sku":"32471547","price":5.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/SHSBoreUpNozzleforM4_21.4mm_TitanForgeAirsoft.webp?v=1790356577","url":"https:\/\/www.titanforgeairsoft.com\/products\/shs-bore-up-nozzle-m4-21-4mm","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}