{"product_id":"gx-h-4-pcp-pump-oil-moisture-filter-high-pressure-air-rifle-filling-pump","title":"GX H-4 PCP Hand Pump 3.5 Stage High Pressure - Efficient Fill for PCP","description":"\u003cp\u003eIn this review of the GX H-4 PCP Hand Pump the bottom line is simple: this is a purpose-built, heavy-duty hand pump for shooters and paintball users who need a portable, high-pressure option without a compressor. The pump's exclusive \u003cstrong\u003e3.5 stage high pressure design\u003c\/strong\u003e is the single biggest reason to consider it, since it extracts more air per stroke and reduces the total number of strokes required to fill a tank. It performs well for frequent top-ups of typical 200cc to 500cc PCP tanks and includes an oil-moisture filter that helps protect downstream gear.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003e3.5 stage compression:\u003c\/strong\u003e The multi-stage design compresses more air per stroke, cutting total work and making fills more efficient than many single-stage hand pumps.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eHigh maximum pressure:\u003c\/strong\u003e Rated to 310 bar (4500 psi), it reaches pressures needed for most PCP air rifles and paintball fill stations without electronic equipment.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eOil-moisture filter:\u003c\/strong\u003e The built-in filter removes the majority of moisture and oil, reducing water vapor that can affect regulators and tanks.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eStainless steel construction:\u003c\/strong\u003e A durable stainless steel body, wide base and rubber handle make the pump stable and built for long service life under heavy use.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003ePortable size:\u003c\/strong\u003e Weighing about 3.1 kg and folding from 41.3 in open to 24.5 in closed, it is easy to carry to the field or range.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eAccessory kit included:\u003c\/strong\u003e The package ships with the pump, user manual and accessories needed to get started without hunting for fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe GX H-4 is best for airgun and paintball enthusiasts who need a reliable manual fill option when electrical compressors are impractical or unavailable. It suits owners of 200cc and 500cc PCP tanks who perform regular fills and want better moisture control than a bare pump offers.\u003c\/p\u003e\n\u003cp\u003eIt is not ideal for someone who needs effortless fills at very high volumes or for users unwilling to do manual pumping; several customers note effort increases as pressure climbs above about 1000 psi. If you need frequent, large-capacity fills with minimal effort, an electric compressor or larger fill station is a better choice.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eRobust stainless steel body and wide base provide stability and long-term durability.\u003c\/li\u003e\n \u003cli\u003eEfficient 3.5 stage design reduces the number of strokes required to reach working pressures.\u003c\/li\u003e\n \u003cli\u003eEffective oil-moisture filter helps protect tanks and regulators from moisture and oil contamination.\u003c\/li\u003e\n \u003cli\u003eCompact, portable size and included accessory kit make it field-ready out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003ePumping becomes noticeably harder as pressure rises past about 1000 psi, which is typical for manual pumps and reported by several users.\u003c\/li\u003e\n \u003cli\u003eDocumentation quality earns mixed feedback, so new users may need to follow community tips for best practice.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eMax pressure\u003c\/td\u003e\n\u003ctd\u003e310 bar \/ 4500 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eStage design\u003c\/td\u003e\n\u003ctd\u003e3.5 stage high pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eOutput nut\u003c\/td\u003e\n\u003ctd\u003eM10 x 1 (8 mm quick connector)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApproximately 3.1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eClosed length\u003c\/td\u003e\n\u003ctd\u003e62 cm \/ 24.5 in\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eOpen length\u003c\/td\u003e\n\u003ctd\u003e105 cm \/ 41.3 in\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eHand pump, user manual, accessory kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe GX H-4 PCP Hand Pump is a practical, well-built manual fill solution for shooters and paintball players who want a portable, durable way to top off PCP tanks without a compressor. Its efficient \u003cstrong\u003e3.5 stage\u003c\/strong\u003e compression and moisture control make it good value for users prepared for manual effort at high pressures; for high-volume or zero-effort fills, an electric option remains preferable.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the pump control moisture?\u003c\/strong\u003e\u003cbr\u003eThe integrated oil-moisture filter removes most moisture and oil and uses a desiccant you can dry or replace when its color indicator changes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat fittings does it use?\u003c\/strong\u003e\u003cbr\u003eOutput uses an M10 x 1 nut with an 8 mm quick connector; verify compatibility with your tank fittings or use included adapters.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs oil required at purchase?\u003c\/strong\u003e\u003cbr\u003eDo not add oil or grease on arrival; if oil is added later, pump freely for 100 strokes without a tank attached to clear excess before connecting.\u003c\/p\u003e","brand":"GX pump","offers":[{"title":"Default Title","offer_id":46778630111451,"sku":"B0861B8JPQ","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51eyzBcItIL._AC_SL1000.jpg?v=1747659505","url":"https:\/\/gearmusthave.com\/products\/gx-h-4-pcp-pump-oil-moisture-filter-high-pressure-air-rifle-filling-pump","provider":"GearMustHave","version":"1.0","type":"link"}