The IV core drivetrain had become synonymous with the Geo line. Originally developed for the iconic GSL, its launch was a defining moment for spool valve marker technology. It was the first spool valve marker to incorporate Breech Sensing technology into the drivetrain, finally pushing spool valve efficiency into the realms of poppet valve markers.

How does this Breech Sensing technology work? Simply put, it uses the pulse of air behind the ball to help close off the main valve at a predetermined valve chamber pressure. By closing off the main valve before the valve chamber is allowed to fully empty, it traps tail-end air that is at a pressure that would have no effect on the velocity of the paintball. This trapped air in the valve chamber would otherwise have been released, and wasted, down the barrel. By trapping this otherwise wasted air, it requires less air to top the firing chamber back up ready for the next shot. The result? A huge increase in efficiency, with zero downsides.It was a truly groundbreaking piece of technology in paintball marker development. But, as always, we continually push forwards to make improvements wherever possible, the result of which brings us an all new drivetrain to power the next generation of Geo fans.

The Eclipse Geo R5 introduces the GR drivetrain. A brand new design with the intent of improving every aspect of the marker’s performance. From efficiency, to feel, to sound signature, to the more hands-on features such as being quicker and easier to strip, clean and maintain. Every aspect of the GR drivetrain is an improvement over that legendary IV core.

Increased internal volume, low operating pressure, improved valve profiling and breech sensing technology all combine to produce the most phenomenal shot quality with exceptional levels of efficiency.

And of course a Geo wouldn’t be a Geo without an SFR. The concept of Solenoid Flow Restriction was born with the Geo, giving the user the ability to tune the bolt speed and shot profile to their own preference. The factory installed high-flow SFR provides a range of adjustment that is suitable for almost every playing condition, but in very hot environments this can be replaced with the additional low-flow SFR.