{"product_id":"gate-pulsar-d-hpa-engine","title":"GATE PULSAR D HPA Engine — Dual Solenoid Closed Bolt, with TITAN II \/ ASTER II Bluetooth","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\u003cstrong style=\"color:#1a6b3a;\"\u003eGATE PULSAR D — the world’s first dual-solenoid closed-bolt HPA engine, and the one that stops caring how good your gearbox is.\u003c\/strong\u003e\u003c\/div\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⚠ \u003cstrong\u003eThis is an engine, not a complete gun.\u003c\/strong\u003e It replaces your gearbox internals and needs an external \u003ca href=\"\/collections\/hpa-tanks\" style=\"color:#1B3A6B;\"\u003eHPA tank\u003c\/a\u003e, a secondary \u003ca href=\"\/collections\/hpa-regulators\" style=\"color:#1B3A6B;\"\u003eregulator\u003c\/a\u003e and an \u003ca href=\"\/collections\/hpa-lines\" style=\"color:#1B3A6B;\"\u003eHPA line\u003c\/a\u003e to run — none included. New to HPA? Start with our \u003ca href=\"\/pages\/hpa-airsoft-uk-the-complete-guide\" style=\"color:#1B3A6B;\"\u003ecomplete HPA guide\u003c\/a\u003e.\u003c\/div\u003e\n\u003cp\u003eEvery open-bolt HPA engine shares the same weakness: it depends on the gun around it. If the gearbox is not axially aligned, the nozzle wanders, the hop seals inconsistently, and you chase FPS spread you cannot fix with pressure. The PULSAR D solves that with a second solenoid and a closed-bolt cycle, driving the nozzle positively in both directions instead of relying on a spring and the build quality around it.\u003c\/p\u003e\n\u003cp\u003eThe result is an engine that GATE describe as far less sensitive to replica and assembly quality — zero nozzle wobble, no mid-cap syndrome, and a stable trajectory in full auto rather than just in semi. It holds FPS on auto right up to its 40 RPS ceiling with no drop relative to semi, which is not something most engines can claim.\u003c\/p\u003e\n\u003cp\u003eIt is also the more efficient of the two: roughly 0.7 PSI per shot from a 48ci bottle at 90 PSI, against 1 PSI for the PULSAR S. Velocity spans 250 to 650 FPS, so the same engine covers a CQB build and a DMR. Automatic cycle synchronisation handles the calibration that used to mean firing thousands of rounds to find a stable setting.\u003c\/p\u003e\n\u003cp\u003eA multifunctional port lets you add a bolt-catch button, a magazine sensor, a tracer in the hop-up chamber or an electric magazine feed. Everything is configured live through the GCS app over Bluetooth 5.2, including binary trigger, burst, ROF and 50-level optical trigger sensitivity.\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;\"\u003eEngine type\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eDual solenoid HPA — closed bolt (open bolt mode also supported)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eOperating pressure\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e60–140 PSI (high pressure only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eAdjustable ROF\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e1–40 RPS — no FPS drop on auto versus semi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eVelocity\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e250–650 FPS (setup dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eGas consumption\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e~0.7 PSI per shot (90 PSI, 48ci \/ 0.8L 300 bar bottle)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFCU\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eTITAN II or ASTER II Bluetooth — optical trigger, GCS app\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eTrigger sensitivity\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e50 levels in the first 1mm of travel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eFire modes\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSemi, binary, burst, full-auto — all app configurable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eCalibration\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eAutomatic cycle synchronisation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e102 × 25.4 × 38.5mm with cycle sync (100 × 25.4 × 32mm without)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e90g — smallest dual-solenoid closed-bolt HPA engine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eSolenoid voltage\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e5–8.4V — do not exceed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eNozzles\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eCompatible with AEG nozzles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eExpansion\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eMultifunctional port — bolt catch, magazine sensor, hop-up tracer, electric magazine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eGearbox\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eV2 (rear\/front wired) or V3 (kit with tappet plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eConnectivity\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eBluetooth 5.2, GCS app (iOS, Android, macOS, Windows, Wear OS, watchOS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003eOperating temperature\u003c\/td\u003e\n\u003ctd style=\"padding:7px 12px;border:1px solid #eee;\"\u003e-15°C to +50°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\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;\"\u003eGATE Enterprise, Poland\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\u003cp\u003ePick the variant to match your gearbox and wiring: rear wired for most V2 builds, front wired where the battery lives in the stock, or the V3 kit which includes the dedicated tappet plate for AK-pattern and other V3 platforms. The D costs more than the \u003ca href=\"\/products\/gate-pulsar-s-hpa-engine\" style=\"color:#1B3A6B;\"\u003ePULSAR S\u003c\/a\u003e and tops out at 40 RPS rather than 100 — you are paying for consistency and forgiveness, not speed. HPA engine fitting is skilled work; we install and configure these through our \u003ca href=\"\/products\/hpa-tech-service-booking\" style=\"color:#1B3A6B;\"\u003eHPA tech service\u003c\/a\u003e.\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\u003eWhy choose the D over the cheaper PULSAR S?\u003c\/strong\u003e\u003cbr\u003eBecause the D does not depend on your gearbox being perfectly aligned. Its closed-bolt dual-solenoid design eliminates nozzle wobble and mid-cap syndrome, holds FPS in full auto, and uses less air per shot. The S is faster and cheaper; the D is more accurate and far more forgiving of the gun it goes into.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does closed bolt actually mean here?\u003c\/strong\u003e\u003cbr\u003eThe nozzle is driven positively in both directions and sits forward, sealing into the hop before each shot. That gives a more repeatable BB trajectory, particularly on automatic, where open-bolt engines can get inconsistent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work in a V3 gearbox?\u003c\/strong\u003e\u003cbr\u003eYes — the V3 kit variant includes the ASTER II unit and the dedicated V3 tappet plate. Select that option if you are converting an AK-pattern or other V3 platform.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is cycle synchronisation?\u003c\/strong\u003e\u003cbr\u003eAn automatic calibration system that synchronises the nozzle movement cycle, so you get stable FPS and trajectory without firing thousands of rounds to dial it in by hand.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat else do I need to run it?\u003c\/strong\u003e\u003cbr\u003eAir and power: a tank, a secondary regulator, a line, and a battery within the 5–8.4V window to drive the control unit. The engine is supplied on its own.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan you fit and configure it?\u003c\/strong\u003e\u003cbr\u003eYes. We install GATE engines, programme the TITAN II or ASTER II through the GCS app and chronograph to your site limit before it goes back.\u003c\/p\u003e\n\u003cdiv style=\"background:#fde8e8;border-left:4px solid #c0392b;padding:12px 16px;border-radius:0 6px 6px 0;margin:0 0 16px;font-size:13px;\"\u003e⛔ \u003cstrong\u003eDo not exceed 8.4V.\u003c\/strong\u003e The solenoid voltage range is 5–8.4V — a higher-voltage battery will damage the unit. Run within 60–140 PSI through a secondary regulator, and never connect an engine directly to a tank output.\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 we fit, wire and programme GATE engines in our workshop — see the \u003ca href=\"\/products\/hpa-tech-service-booking\" style=\"color:#cdd6f4;\"\u003eHPA tech service\u003c\/a\u003e, browse \u003ca href=\"\/collections\/hpa-engines\" style=\"color:#cdd6f4;\"\u003eHPA engines\u003c\/a\u003e, or \u003ca href=\"https:\/\/wa.me\/447874452357\" style=\"color:#cdd6f4;\"\u003emessage us on WhatsApp\u003c\/a\u003e and we will spec the right one for your build.\u003c\/div\u003e","brand":"Gate","offers":[{"title":"Pulsar D - Rear Wired","offer_id":55498921279864,"sku":"77158753","price":439.95,"currency_code":"GBP","in_stock":true},{"title":"Pulsar D - Front Wired","offer_id":55498921312632,"sku":"76669948","price":494.95,"currency_code":"GBP","in_stock":true},{"title":"Pulsar D - V3 Kit","offer_id":55498921345400,"sku":"95756476","price":494.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0562\/8097\/3450\/files\/Untitleddesign_31.png?v=1773333394","url":"https:\/\/www.titanforgeairsoft.com\/products\/gate-pulsar-d-hpa-engine","provider":"Titan Forge Airsoft","version":"1.0","type":"link"}