I too have a Harris and it works well (BR, notched, swivel, and updated cant lock). I would like to try a Atlas, but 279$ for the quick throw lever model, plus 30$ for the picitani rail for your gun! Hard to justify the cost at this time. I will say, it may come in handy though, as I recently have been hiking and using my eberlestock J34
pack. I can not attach my Harris to my rifle and put it in the scabbard. Therefore I may need an alternative. I timed it the other day. I can take my pack off, take my gun out, set up, acquire a target, and send a dry fire in under a minute. My biggest issue was trying to attach my Harris to my gun!