{"product_id":"nuprol-airsoft-gas-4-0-300g","title":"NUPROL Airsoft Gas 4.0 (300g)","description":"\u003cp\u003e\u003cstrong\u003eNUPROL Airsoft Gas 4.0\u003c\/strong\u003e is an \u003cstrong\u003eultra-high-pressure 300g gas\u003c\/strong\u003e engineered to deliver \u003cstrong\u003emaximum power, strong recoil and stable cycling\u003c\/strong\u003e for the most demanding \u003cstrong\u003eheavy GBB platforms\u003c\/strong\u003e. Designed specifically for \u003cstrong\u003eGBB rifles, DMR setups and high-mass bolt or slide systems\u003c\/strong\u003e, Gas 4.0 provides the output required where standard and high-pressure gases begin to fall short.\u003c\/p\u003e\n\u003cp\u003eThis is the most powerful gas in the NUPROL lineup—built for realism, authority and cold-weather reliability.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features (Quick View)\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUltra-high-pressure airsoft gas\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e300g can size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for \u003cstrong\u003eheavy GBB rifles and DMR platforms\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStrong recoil and stable FPS output\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSilicone-lubricated\u003c\/strong\u003e for seal and valve protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTrace additives\u003c\/strong\u003e enhance gas expansion rate\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eReliable cycling in \u003cstrong\u003ecold and demanding conditions\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupports \u003cstrong\u003ehigh-mass operating systems\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFormulation \u0026amp; Extreme Reliability\u003c\/h2\u003e\n\u003cp\u003eNUPROL Gas 4.0 uses a refined propane base combined with the \u003cstrong\u003ehighest concentration of NUPROL’s trace additive expansion technology\u003c\/strong\u003e. This advanced additive package accelerates expansion inside the magazine and helps stabilise pressure during sustained fire, long bursts or rapid semi-auto use.\u003c\/p\u003e\n\u003cp\u003eThe result is dependable cycling and consistent FPS even when driving heavy bolts, reinforced internals or extended barrels under cold or high-load conditions.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePerformance \u0026amp; Heavy Platform Use\u003c\/h2\u003e\n\u003cp\u003eGas 4.0 is purpose-built for platforms that demand maximum operating pressure. It delivers an authoritative recoil impulse and consistent cycling in replicas where lower-pressure gases may struggle—particularly in outdoor winter games or early-morning starts.\u003c\/p\u003e\n\u003cp\u003eIntegrated silicone lubrication protects seals and valves from the increased forces generated by ultra-high-pressure operation, supporting long-term reliability in high-performance builds.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHeavy GBB rifles\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDMR gas platforms\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-mass bolt and slide systems\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRecommended only for replicas designed to safely handle \u003cstrong\u003eultra-high-pressure airsoft gas\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eIdeal For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHeavy GBB rifle platforms\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGas-powered DMR builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCold-weather skirmishing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHigh-mass, reinforced internals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePlayers seeking \u003cstrong\u003emaximum recoil and realism\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e NUPROL\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Airsoft Gas\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eGas Pressure:\u003c\/strong\u003e Ultra-High\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan Size:\u003c\/strong\u003e 300 g\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLubrication:\u003c\/strong\u003e Silicone-infused\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAdditives:\u003c\/strong\u003e High-density trace expansion package\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUse:\u003c\/strong\u003e Heavy rifles \u0026amp; DMRs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEnvironment:\u003c\/strong\u003e Cold to moderate conditions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eRange Overview – NUPROL Gas Range\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNUPROL Gas Range\u003c\/strong\u003e is the flagship product line that inspired the brand name—\u003cstrong\u003e“New Propellant.”\u003c\/strong\u003e Developed specifically for airsoft, the range delivers reliable pressure levels, predictable cycling and long-term equipment care.\u003c\/p\u003e\n\u003cp\u003eSpanning multiple pressure grades and silicone-free alternatives, every blend is enhanced with NUPROL’s trace additive expansion system to stabilise pressure and maintain consistent FPS. From low-pressure options to ultra-power solutions for heavy GBB rifles, the range delivers clean, dependable performance across all levels of play.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eManufacturer\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eNUPROL\u003c\/strong\u003e is a leading force in the airsoft industry, delivering a comprehensive range of consumables, replicas, attachments and upgrades. Backed by extensive industry knowledge and continuous development, NUPROL products are trusted for their reliability, innovation and consistent on-field performance.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eSafety Information\u003c\/h2\u003e\n\u003cp\u003eThis product is supplied in a \u003cstrong\u003epressurised container\u003c\/strong\u003e and contains \u003cstrong\u003eflammable gas\u003c\/strong\u003e. Keep away from heat sources, sparks and open flames. Do not pierce or burn the container, even when empty. Protect from direct sunlight and do not expose to temperatures above \u003cstrong\u003e50°C\u003c\/strong\u003e. Store out of reach of children and use only as directed.\u003c\/p\u003e","brand":"Nuprol","offers":[{"title":"Default Title","offer_id":56640682656092,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/0021\/7180\/files\/9036_1.jpg?v=1770155957","url":"https:\/\/www.firstandonlyretail.co.uk\/products\/nuprol-airsoft-gas-4-0-300g","provider":"First and Only Retail","version":"1.0","type":"link"}