For all Summit and Legacy vests received prior to spring of 2023, these G-Hooks are plug and play with all existing vests. The G-Hook feature is an improvement to the suspension of the vest which allows you to open the game bag easier for better cleaning abilities as well as quickly loading a dog, in an emergency.
Additionally, because the G-Hooks have a tension lock on them, you can leverage this feature by adjusting the height of the G-Hook on the rear yolk of your vests to properly level your game bag and even move them up higher to have them act as a 'load lifter' and bring any weight in your game bag closer to your body and more in-line with the waist belt, making it more comfortable for long walks out after a successful day.