RogueWorx show how you can install their Zenith Kit made for the GHK Airsoft G5 Gas Blowback. The GHK G5 has been known to have cracking problems with its plastic lower receiver since its release. The Zenith Kit by RogueWorx tackles this issue by installing a complex internal-external skeleton. This skeleton absorbs and distributes the shock of the bolt carrier impact more effectively throughout the body of the gun, preventing cracks.