If noise is your goal, then you can drill the closed exit holes in the top and bottom exhaust exit, I like that standard cans on a K16, I did have Remus on mine for a while, but switched back as even with ear plugs, the drone was terrible at motorway speeds.
On the K1600 Forum, not only can you find a useful thread on stashing your handgun on the bike, but also on drilling the standard cans and before and after videos.