Silencerco and Crye Precision collaborated to make a SIX12 with a 6 inch Salvo 12 suppressor. Crye Precision integrated the Salvo 12 into the handguard. Still no price or ETA on the release of the Six 12. All the display models at Crye and this one at the Silencerco booth all have 3D printed components. They have added M-Lok holes into their handguard designs.
Here are pics of the regular SIX12s at the Crye Precision booth.