{"product_id":"polarstar-kythera-hpa-engine-for-airsoft-rifles-model-sa-ver3-ak-1","title":"PolarStar \"Kythera\" HPA Engine for Airsoft Rifles (Model: SA - Ver3 AK)","description":"\u003ch2 data-start=\"246\" data-end=\"334\"\u003e\u003cstrong data-start=\"249\" data-end=\"334\"\u003ePolarStar Kythera HPA Engine for Airsoft Rifles – Ver3 AK (Mechanical HPA System)\u003c\/strong\u003e\u003c\/h2\u003e\r\n\u003cp data-start=\"336\" data-end=\"733\"\u003eUpgrade your AK AEG platform with the \u003cstrong data-start=\"374\" data-end=\"418\"\u003ePolarStar \"Kythera\" HPA Engine – Ver3 AK\u003c\/strong\u003e, the most advanced and eagerly awaited mechanical HPA system from \u003cstrong data-start=\"485\" data-end=\"506\"\u003ePolarStar Airsoft\u003c\/strong\u003e. Engineered from the ground up as a \u003cstrong data-start=\"543\" data-end=\"596\"\u003efully mechanical, high-performance drop-in engine\u003c\/strong\u003e, the Kythera delivers groundbreaking efficiency, incredible consistency, and unmatched realism—\u003cstrong data-start=\"692\" data-end=\"732\"\u003eall without electronics or batteries\u003c\/strong\u003e.\u003c\/p\u003e\r\n\u003cp data-start=\"735\" data-end=\"909\"\u003eWhether you're building a precision DMR, CQB blaster, or rugged field rifle, the \u003cstrong data-start=\"816\" data-end=\"835\"\u003eKythera SA Ver3\u003c\/strong\u003e offers \u003cstrong data-start=\"843\" data-end=\"872\"\u003egame-changing performance\u003c\/strong\u003e in a compact and waterproof package.\u003c\/p\u003e\r\n\r\n\r\n\u003chr data-start=\"911\" data-end=\"914\"\u003e\r\n\r\n\u003ch3 data-start=\"916\" data-end=\"974\"\u003e\u003cstrong data-start=\"920\" data-end=\"974\"\u003eTrue Mechanical Innovation – No Batteries Required\u003c\/strong\u003e\u003c\/h3\u003e\r\n\u003cp data-start=\"976\" data-end=\"1269\"\u003eUnlike traditional HPA systems that rely on solenoids, electronics, or FCUs, the \u003cstrong data-start=\"1057\" data-end=\"1068\"\u003eKythera\u003c\/strong\u003e was built from scratch as a mechanical system. That means \u003cstrong data-start=\"1127\" data-end=\"1173\"\u003eno batteries, no wires, and no electronics\u003c\/strong\u003e—making it completely waterproof and virtually immune to field failure due to electrical issues.\u003c\/p\u003e\r\n\u003cp data-start=\"1271\" data-end=\"1409\"\u003eThis is not a conversion of an existing design; it’s a revolutionary air-powered system that functions with \u003cstrong data-start=\"1379\" data-end=\"1408\"\u003epure mechanical precision\u003c\/strong\u003e.\u003c\/p\u003e\r\n\r\n\r\n\u003chr data-start=\"1411\" data-end=\"1414\"\u003e\r\n\r\n\u003ch3 data-start=\"1416\" data-end=\"1468\"\u003e\u003cstrong data-start=\"1420\" data-end=\"1468\"\u003eRealistic Trigger Feel – Like a True Firearm\u003c\/strong\u003e\u003c\/h3\u003e\r\n\u003cp data-start=\"1470\" data-end=\"1810\"\u003eWhat truly sets the Kythera apart is its \u003cstrong data-start=\"1511\" data-end=\"1561\"\u003esingle-action, firearm-style trigger mechanism\u003c\/strong\u003e. The \u003cstrong data-start=\"1567\" data-end=\"1597\"\u003ehardened alloy steel sears\u003c\/strong\u003e interact with the \u003cstrong data-start=\"1616\" data-end=\"1647\"\u003estainless steel spool valve\u003c\/strong\u003e just like a real firearm's hammer and sear system. This provides a crisp, tactile trigger break and reset that feels more authentic than anything else in airsoft.\u003c\/p\u003e\r\n\u003cp data-start=\"1812\" data-end=\"1955\"\u003eWith full \u003cstrong data-start=\"1822\" data-end=\"1847\"\u003etrigger adjustability\u003c\/strong\u003e—including weight, length of pull, and over-travel—you can dial in the perfect feel for your shooting style.\u003c\/p\u003e\r\n\r\n\r\n\u003chr data-start=\"1957\" data-end=\"1960\"\u003e\r\n\r\n\u003ch3 data-start=\"1962\" data-end=\"2004\"\u003e\u003cstrong data-start=\"1966\" data-end=\"2004\"\u003eConsistent Closed-Bolt Performance\u003c\/strong\u003e\u003c\/h3\u003e\r\n\u003cp data-start=\"2006\" data-end=\"2283\"\u003eThe \u003cstrong data-start=\"2010\" data-end=\"2075\"\u003eKythera completes a full shot cycle on the trigger pull alone\u003c\/strong\u003e, allowing consistent closed-bolt performance similar to PolarStar's Fusion Engine and F2. The nozzle chambers the next BB and the firing volume refills automatically—\u003cstrong data-start=\"2242\" data-end=\"2282\"\u003eno need to release the trigger first\u003c\/strong\u003e.\u003c\/p\u003e\r\n\u003cp data-start=\"2285\" data-end=\"2444\"\u003eThis means faster follow-up shots, improved accuracy, and significantly reduced chance of double feeds. It's built for \u003cstrong data-start=\"2404\" data-end=\"2443\"\u003espeed, precision, and dependability\u003c\/strong\u003e.\u003c\/p\u003e\r\n\r\n\r\n\u003chr data-start=\"2446\" data-end=\"2449\"\u003e\r\n\r\n\u003ch3 data-start=\"2451\" data-end=\"2502\"\u003e\u003cstrong data-start=\"2455\" data-end=\"2502\"\u003eSuperior Efficiency and Wide Velocity Range\u003c\/strong\u003e\u003c\/h3\u003e\r\n\u003cp data-start=\"2504\" data-end=\"2782\"\u003eThe \u003cstrong data-start=\"2508\" data-end=\"2549\"\u003eKythera’s patent-pending valve system\u003c\/strong\u003e is ultra-efficient—using \u003cstrong data-start=\"2575\" data-end=\"2614\"\u003e100% of the air input for each shot\u003c\/strong\u003e, without a pilot valve. The valve opens and closes purely through spring force, ensuring \u003cstrong data-start=\"2704\" data-end=\"2740\"\u003eperfect shot-to-shot consistency\u003c\/strong\u003e every time, regardless of input pressure.\u003c\/p\u003e\r\n\u003cp data-start=\"2784\" data-end=\"3077\"\u003eWith a \u003cstrong data-start=\"2791\" data-end=\"2828\"\u003ewide pressure range of 60–180 PSI\u003c\/strong\u003e, the Kythera allows for flexible velocity tuning. When tested with a 6.05mm x 380mm barrel and 0.20g BBs, velocities ranged from \u003cstrong data-start=\"2958\" data-end=\"2976\"\u003e270 to 500 FPS\u003c\/strong\u003e, allowing the Kythera to perform in \u003cstrong data-start=\"3013\" data-end=\"3044\"\u003eCQB, field, or sniper roles\u003c\/strong\u003e with just a pressure adjustment.\u003c\/p\u003e\r\n\r\n\r\n\u003chr data-start=\"3079\" data-end=\"3082\"\u003e\r\n\r\n\u003ch3 data-start=\"3084\" data-end=\"3135\"\u003e\u003cstrong data-start=\"3088\" data-end=\"3135\"\u003eEasy Installation \u0026amp; Versatile Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\r\n\u003cp data-start=\"3137\" data-end=\"3412\"\u003eThe \u003cstrong data-start=\"3141\" data-end=\"3160\"\u003eKythera SA Ver3\u003c\/strong\u003e installs easily into any standard \u003cstrong data-start=\"3195\" data-end=\"3220\"\u003eVer3 AK-style gearbox\u003c\/strong\u003e with \u003cstrong data-start=\"3226\" data-end=\"3252\"\u003eno major modifications\u003c\/strong\u003e. The system comes as a \u003cstrong data-start=\"3276\" data-end=\"3305\"\u003esingle pre-assembled unit\u003c\/strong\u003e, and only a few original gearbox components (trigger, safety, selector, spring guide) need to be retained.\u003c\/p\u003e\r\n\u003cp data-start=\"3414\" data-end=\"3557\"\u003eThe \u003cstrong data-start=\"3418\" data-end=\"3445\"\u003euniversal charging cord\u003c\/strong\u003e allows manual cocking of the spool valve if pressure drops too low—ensuring reliable operation in any scenario.\u003c\/p\u003e\r\n\r\n\r\n\u003chr data-start=\"3559\" data-end=\"3562\"\u003e\r\n\r\n\u003ch3 data-start=\"3564\" data-end=\"3585\"\u003e\u003cstrong data-start=\"3568\" data-end=\"3585\"\u003eKey Features:\u003c\/strong\u003e\u003c\/h3\u003e\r\n\u003cul data-start=\"3587\" data-end=\"4089\"\u003e\r\n \t\u003cli data-start=\"3587\" data-end=\"3651\"\u003e\r\n\u003cp data-start=\"3589\" data-end=\"3651\"\u003e100% \u003cstrong data-start=\"3594\" data-end=\"3619\"\u003eMechanical HPA system\u003c\/strong\u003e – no electronics or batteries\u003c\/p\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli data-start=\"3652\" data-end=\"3707\"\u003e\r\n\u003cp data-start=\"3654\" data-end=\"3707\"\u003eDesigned specifically for \u003cstrong data-start=\"3680\" data-end=\"3705\"\u003eVer3 AK AEG gearboxes\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli data-start=\"3708\" data-end=\"3771\"\u003e\r\n\u003cp data-start=\"3710\" data-end=\"3771\"\u003e\u003cstrong data-start=\"3710\" data-end=\"3745\"\u003eRealistic single-action trigger\u003c\/strong\u003e with full adjustability\u003c\/p\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli data-start=\"3772\" data-end=\"3829\"\u003e\r\n\u003cp data-start=\"3774\" data-end=\"3829\"\u003e\u003cstrong data-start=\"3774\" data-end=\"3802\"\u003eEfficient and consistent\u003c\/strong\u003e closed-bolt valve system\u003c\/p\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli data-start=\"3830\" data-end=\"3894\"\u003e\r\n\u003cp data-start=\"3832\" data-end=\"3894\"\u003e\u003cstrong data-start=\"3832\" data-end=\"3858\"\u003eWaterproof and durable\u003c\/strong\u003e with minimal maintenance required\u003c\/p\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli data-start=\"3895\" data-end=\"3939\"\u003e\r\n\u003cp data-start=\"3897\" data-end=\"3939\"\u003e\u003cstrong data-start=\"3897\" data-end=\"3937\"\u003eAdjustable nozzle dwell\/return speed\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli data-start=\"3940\" data-end=\"3990\"\u003e\r\n\u003cp data-start=\"3942\" data-end=\"3990\"\u003e\u003cstrong data-start=\"3942\" data-end=\"3973\"\u003eVelocity range: 270–500 FPS\u003c\/strong\u003e with 0.20g BBs\u003c\/p\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli data-start=\"3991\" data-end=\"4029\"\u003e\r\n\u003cp data-start=\"3993\" data-end=\"4029\"\u003eOperating pressure: \u003cstrong data-start=\"4013\" data-end=\"4027\"\u003e60–180 PSI\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003c\/li\u003e\r\n \t\u003cli data-start=\"4030\" data-end=\"4089\"\u003e\r\n\u003cp data-start=\"4032\" data-end=\"4089\"\u003eIncludes \u003cstrong data-start=\"4041\" data-end=\"4068\"\u003euniversal charging cord\u003c\/strong\u003e for manual cocking\u003c\/p\u003e\r\n\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003chr data-start=\"4091\" data-end=\"4094\"\u003e\r\n\r\n\u003ch3 data-start=\"4096\" data-end=\"4127\"\u003e\u003cstrong data-start=\"4100\" data-end=\"4127\"\u003eAbout PolarStar Airsoft\u003c\/strong\u003e\u003c\/h3\u003e\r\n\u003cp data-start=\"4129\" data-end=\"4562\"\u003e\u003cstrong data-start=\"4129\" data-end=\"4150\"\u003ePolarStar Airsoft\u003c\/strong\u003e, a division of \u003cstrong data-start=\"4166\" data-end=\"4201\"\u003ePolarStar Engineering \u0026amp; Machine\u003c\/strong\u003e, has been a leader in high-performance airsoft innovation since 2009. Known for introducing the game-changing \u003cstrong data-start=\"4312\" data-end=\"4329\"\u003eFusion Engine\u003c\/strong\u003e, PolarStar continues to push the boundaries of what’s possible in airsoft technology. All PolarStar products are \u003cstrong data-start=\"4443\" data-end=\"4462\"\u003eMade in the USA\u003c\/strong\u003e, engineered with the same precision and quality control trusted by professionals across industries.\u003c\/p\u003e\r\n\r\n\r\n\u003chr data-start=\"4564\" data-end=\"4567\"\u003e\r\n\r\n\u003ch3 data-start=\"4569\" data-end=\"4621\"\u003e\u003cstrong data-start=\"4573\" data-end=\"4621\"\u003eThe Kythera: Simplicity, Efficiency, Realism\u003c\/strong\u003e\u003c\/h3\u003e\r\n\u003cp data-start=\"4623\" data-end=\"4902\"\u003eWhether you're tired of charging batteries or want a more durable, waterproof, and \u003cstrong data-start=\"4706\" data-end=\"4737\"\u003eultra-consistent HPA system\u003c\/strong\u003e, the \u003cstrong data-start=\"4743\" data-end=\"4762\"\u003eKythera SA Ver3\u003c\/strong\u003e delivers. With its \u003cstrong data-start=\"4782\" data-end=\"4808\"\u003erealistic trigger feel\u003c\/strong\u003e, \u003cstrong data-start=\"4810\" data-end=\"4835\"\u003eclosed-bolt operation\u003c\/strong\u003e, and \u003cstrong data-start=\"4841\" data-end=\"4868\"\u003eno electronics required\u003c\/strong\u003e, it stands in a class of its own.\u003c\/p\u003e\r\n\u003cp data-start=\"4904\" data-end=\"5013\"\u003e\u003cstrong data-start=\"4904\" data-end=\"4956\"\u003eUpgrade your AK with the PolarStar Kythera today\u003c\/strong\u003e—and experience the future of mechanical HPA performance.\u003c\/p\u003e","brand":"Polarstar","offers":[{"title":"Default Title","offer_id":47468111331558,"sku":null,"price":417.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0793\/6393\/2390\/files\/9f0112d1-pstar-19157-removebg-preview.png?v=1774002149","url":"https:\/\/ngrwzj-i1.myshopify.com\/products\/polarstar-kythera-hpa-engine-for-airsoft-rifles-model-sa-ver3-ak-1","provider":"CQC Airsoft ","version":"1.0","type":"link"}