The original Gtek was the first Eclipse marker to bare the now-iconic Gamma Core drivetrain. Efficient. Smooth. Quiet. Gentle on even the most fragile paint. And reliable beyond comprehension. From frozen wastelands to scorched earth deserts the Gamma Core delivers all of its potential, all of the time. So the decision to continue with the Gamma Core in this, the Second Generation of Gtek was a simple one. A no-brainer. But that didn't mean the rest of the marker wouldn't see a serious overhaul. The 170R combines a raft of advanced features to bring the Gtek line bang up to date. The main focus has been achieving a completely hoseless version of the Gtek, while still retaining simplicity of assembly and of course, reliability. This has been achieved by placing the brand new inline regulator directly adjacent to the new POPS assembly, in the base of the frame, moving the battery into the foregrip, and mounting the solenoid inside the frame, rather than mounting to the bottom of the body. Even the new breech sensor system, that utilizes prismatic light pipes to guide the infrared light through the breech, is attached to the frame. This means that all critical components are now housed within the frame, simplifying the design, and making maintenance and break down far quicker and easier. Adding to the simplicity of the package, the 170R also includes toolless access to the eye covers, detent, battery and of course the drivetrain and bolt. These all go to make the 170R incredibly simple to clean and maintain. A pleasure to live with both on and off the field.