{"product_id":"polarstar-jack-f2-bv309a-bullet-valve","title":"PolarStar JACK \/ F2 BV309A Bullet Valve — 200 PSI","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;\"\u003ePolarStar BV309A Bullet Valve — one service part covering both the JACK and the F2.\u003c\/strong\u003e Rated to 200 PSI.\u003c\/div\u003e\u003cp\u003eThe bullet valve is a working component in the air path, cycling under pressure on every shot. Like any valve doing that job, it eventually wears — and when it does the symptoms look alarming: inconsistent velocity, poor air efficiency, or an engine that will not cycle cleanly.\u003c\/p\u003e\u003cp\u003eIt is a replaceable part, not a terminal fault. Fitting a fresh valve returns an engine to how it behaved when it was new, which is a far better outcome than the diagnosis usually feels like.\u003c\/p\u003e\u003cp\u003eUsefully, the \u003cstrong\u003eBV309A is shared between the JACK and the F2\u003c\/strong\u003e. One part number covers both platforms, which simplifies things considerably if you run or service more than one. Rated to \u003cstrong\u003e200 PSI\u003c\/strong\u003e.\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;\"\u003eBullet valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eBV309A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003ePressure rating\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e200 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFits\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003ePolarStar JACK and F2 engines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eRole\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eService and wear part\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;\"\u003ePolarStar\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\u003eShared across JACK and F2, so one spare covers both if you run either.\u003cbr\u003e\u003cbr\u003eInconsistent velocity or poor efficiency on a previously healthy engine is often a valve rather than a regulator or a leak — worth checking before chasing the problem elsewhere.\u003c\/p\u003e\u003ch2 style=\"font-size:16px;color:#1B3A6B;margin:18px 0 8px;\"\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoes it really fit both engines?\u003c\/strong\u003e\u003cbr\u003eYes, the BV309A is shared between the JACK and F2 platforms, which is convenient if you own or service both.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the symptoms of a worn valve?\u003c\/strong\u003e\u003cbr\u003eInconsistent velocity, worse air efficiency than you remember, or an engine that will not cycle cleanly. It is easy to mistake for a regulator problem.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat pressure is it rated to?\u003c\/strong\u003e\u003cbr\u003e200 PSI, which covers normal airsoft HPA operating ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan you fit it?\u003c\/strong\u003e\u003cbr\u003eYes, we service JACK and F2 engines in the workshop.\u003c\/p\u003e\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⚠ \u003cstrong\u003eRunning HPA:\u003c\/strong\u003e always feed an engine through a secondary regulator and never connect it directly to a tank output. Check the rated pressure before setting a regulator, and chronograph to your site limit before playing.\u003c\/div\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 see the \u003ca href=\"\/products\/polarstar-jack-hpa-conversion-kit-v2-m4m16\" style=\"color:#cdd6f4;\"\u003eJACK\u003c\/a\u003e and \u003ca href=\"\/products\/polarstar-f2-drop-in-conversion-kit\" style=\"color:#cdd6f4;\"\u003eF2\u003c\/a\u003e engines it services. We are an HPA tech centre and fit, tune and chronograph these in the workshop, or \u003ca href=\"https:\/\/wa.me\/447874452357\" style=\"color:#cdd6f4;\"\u003emessage us on WhatsApp\u003c\/a\u003e.\u003c\/div\u003e","brand":"Polarstar","offers":[{"title":"Default Title","offer_id":55648901071224,"sku":"10000363","price":69.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/PolarStarJACKF2BV309ABulletValve_TitanForgeAirsoft.webp?v=1788520694","url":"https:\/\/www.titanforgeairsoft.com\/products\/polarstar-jack-f2-bv309a-bullet-valve","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}