Description
GX E-5K2 400BAR 4-STAGE AUTOSTOP COMPRESSOR
Designed for heavy-duty, continuous use, the GX E-5K2 400Bar 4-Stage Autostop Compressor is an absolute beast. Most praised for durability, being exceptionally quiet and a high inflation rate, it is the cream of the crop of PCP compressors in the GX Pump range. With more features and more capabilities than other models in the GX Pump range, you can’t go wrong with the E-5K2. In fact, you won’t find any other brand in it’s class that falls in this affordable price bracket.
Praised worldwide for being a workhorse with unbeatable value, the GX E-5K2 reaches pressures up to 400 BAR. Thanks to the dual-cylinder, 4-stage compression setup for fast filling speed, you can fill your cylinders quickly and easily. You also get an auto-stop function for enhanced safety. Featuring both water and fan cooling, you can run it for extended hours. While GX offers other, smaller portable, and ultra-portable (like the CS3 or L3) compressors, the GX-E-5K2 is the top-tier, largest portable option for filling high-volume tanks.
To be honest, this compressor is on the heavier side at 48kg, but that’s purely due to the rugged construction and quality materials. It is built like a tank, because you want a durable compressor that is safe and reliable. GX added two handles for the top of the compressor, as well as 4 wheels for easily moving the unit.
This video by Mighty Moose Outdoors illustrates a detailed unboxing, setup, feature and components review.
Features
Dual-Cylinder & 4-Stage Compression: Unlike smaller single-cylinder units, the 5K2 uses a dual-piston setup for faster filling speeds, such as filling a 6.8L tank in 45 minutes.
Power & Capacity: It features a 1200W motor, capable of reaching pressures up to 5800psi, and is designed to handle large PCP/Paintball/Scuba tanks up to 20L.
Weight & Build: It weighs roughly 48 kg (approx. 105 lbs), making it much heavier and more “tank-like” than other portable units.
Cooling System: It features a robust, self-contained water and fan cooling system, allowing it to run for extended periods.
Performance: Capable of filling 6.8L tanks from 0-4500 PSI in about 45 minutes and handles up to 20L tanks.
Quiet Operation: Frequently described as sounding like a “sewing machine” and much quieter than other common compressors.
Features: Includes auto-shutoff (with a safety setting), water-cooling, and is 110V/12V compatible.
Reliability: Uses a gear reducer instead of a belt, providing high torque and ability to start under pressure.
Important Note From Importer
All Pictures shown are for illustration purpose only. Variations may occur due to batch imported. Rifles, cylinders and other items not included, unless specifically stated.
GX may rebrand as Titanium. Illustrations, specifications and information (including Online User Manual) as supplied by Manufacturer / Importer.
Please note that due to the nature of the product and reseller not being able to control the use of the product, these items are not covered by warranty. * Temperature control is very important*
Refer to the product manual or Manufacturer’s website for detailed instructions and guidelines, as well as safety information. Do this before assembling anything. Incorrect set-up and/or use of compressors could cause damage to the compressor and can even cause injury.
About GX Pump
GX Pump (manufactured by Nantong Guangxing Pneumatic Equipment Co., Ltd.) is a specialised manufacturer of high-pressure PCP air compressors. With over 20 years of experience, their product line is quite vast. It includes compressors and their accessories, as well as manual pumps like hand pumps. Based in Jiangsu, China, where the world’s best production facilities are located, according to many. Known for affordable, durable, and reliable airgun/paintball compressors, you can’t be a PCP enthusiast and not know of GX’s products.
They produce and distribute these units worldwide, focusing on patented compression methods and structures. GX offers a variety of compressors, from ultra-portable 12V units to more powerful, larger models. Designed for both air rifles and paintball tanks, you can also fill small diving cylinders with some models. Meanwhile, the larger models can fill large cylinders with ease.
Most units operate either via a 12V DC car battery or a 110V/220V AC wall outlet using a converter. With this array of models, you can focus on high end features, or go for the most affordable. Either way, you get great quality and durable products. Some features worth mentioning are automatic shut-off when reaching set pressure and, on some models, a 30-minute auto-shutdown to prevent overheating. Depending on the model, they use built-in fans (oil-free/water-free in smaller models) or combined water/fan cooling for continuous operation. The E-5K2, their top tier compressor in 2025, is highlighted for being built “like a tank” for high-volume use, like filling larger cylinders.
Capable of reaching pressures between 30MPa/300Bar (4500 PSI) to 400 BAR (5800 PSI), with some models designed for faster, more efficient filling compared to competitors.
GX E-5K2 User Manual (online .pdf)
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