Thomas Machine and Design is currently developing a line of hand guard adapters that allow end users to mount Aero Precision Quantum Hand Guards on Ruger’s popular PC9. They have also stated that they are developing a similar adapter for Ruger 10/22 rifles.
The adapters add about 1.5″ to the overall length of the hand guard which are available in 7, 9, 12, and 15” lengths. Each adapter will come with the selected hand guard (the hand guard is modified by milling off the top rail).
These adapters are not available yet but you can stay tuned to Thomas Machine and Design on social media for the latest information.