Empire Paintball Axe Pro Gun Full feature Redline OLED board with joystick navigation Now only 2 hex wrenches needed for all screws on the Axe Pro Improved ergonomics in Grip Frame and Foregrip Re-designed Grip frame has deep angled comfort design Improved weather-proofing including waterproof gasket around battery door More robust foregrip mounting design Simpler push-button in-line bolt removal system New smaller, more compact Relay ASA Improved ASA attachment, no more set screws Polished two piece barrel with standard Bore size .688 improved accuracy & efficiency 7.5 Control bore and spiral porting for excellent ball on ball accuracy that is cross compatible with Pipe barrel backs New trigger design with modular trigger guard Trigger pin removed in favor of screw for easier Trigger maintenance Externally serviceable Eyes, no longer requiring marker dis-assembly for Eye maintenance Double Eye system that is easy to clean Rubber nub-style ball detents Tool-less clamping feedneck Integrated internal air channel