Producing 65% more performance than the GMAX 3400, the GMAX II 3900 has the power and flow to handle up to two guns and is ideal for the professional contractor who sprays a wide variety of coatings. Endurance Chromex Piston Pump The most reliable pumpLasts 2X longer than the next leading brandRepack the pump in minutes with the new QuikPak Cartridge SystemQuikChange pump design allows you to swap the pump easily on the jobFaster cleaning with the QuikAccess intake foot valve The most reliable pump Lasts 2X longer than the next leading brand Repack the pump in minutes with the new QuikPak Cartridge System QuikChange pump design allows you to swap the pump easily on the job Faster cleaning with the QuikAccess intake foot valve SmartControl 3.0 Consistent spray fan & pressure controlHandles the widest range of coatings with the most consistent fan patternLowest dead band at any pressure Consistent spray fan & pressure control Handles the widest range of coatings with the most consistent fan pattern Lowest dead band at any pressure Precision Advantage Drive The longest lasting driveHardened steel gears provide extremely quiet operationLifetime Warranty The longest lasting drive Hardened steel gears provide extremely quiet operation Lifetime Warranty Easy Out Pump Filter Easy maintenance & less cloggingExclusive inside-out filtering won't collapse to ensure a quality finishVertical design for less mess Easy maintenance & less clogging Exclusive inside-out filtering won't collapse to ensure a quality finish Vertical design for less mess Heavy-Duty Prime Valve Maintenance-free design withstands high-pressure dumping Maintenance-free design withstands high-pressure dumping Durable Cart Design Rugged and easy-to-maneuverThick chrome over steel and pneumatic wheels for tough jobsite conditionsRetractable handle doubles as coiled hose storage Rugged and easy-to-maneuver Thick chrome over steel and pneumatic wheels for tough jobsite conditions Retractable handle doubles as coiled hose storage Honda® Engine Reliable, powerful & easy-to-startOil Alert shuts down engine to prevent damage if oil level drops too lowContractor Preferred Reliable, powerful & easy-to-start Oil Alert shuts down engine to prevent damage if oil level drops too low Contractor Preferred Contractor PC Spray Gun All-day comfort & controlLightest weight gun in its classUp to 50% lighter trigger pull forceE-Z Fit adjustable trigger lengthComplete gun rebuild in seconds with ProConnect cartridgeMore info: graco.com/ContractorPC All-day comfort & control Lightest weight gun in its class Up to 50% lighter trigger pull force E-Z Fit adjustable trigger length Complete gun rebuild in seconds with ProConnect cartridge More info: graco.com/ContractorPC Jobsite Ready Includes RAC X SwitchTip and 50 ft of BlueMax II hose Includes RAC X SwitchTip and 50 ft of BlueMax II hose