I actually mentioned that in my review of the PMM mount. The problem is the rear QD mount doesn't rotate freely enough to allow the sling to rotate down.I just installed mine on my 16 and 17 also. Anyone having trouble with the sling getting in the way of your cheek weld? I'm using a Blue Force Gear padded sling.
PMM is working on a lefty QD solution, as is IWC. The original threads are listed below for your reference:The only option for lefty's for a QD mount is the GG&G receiver mount?
Raider, I'm playing catch up right now while still trying to address some other users want(Left mounts, 360* rotation mounts,and the oval rear lug issue) When I am done with them I can visit the Moon child for you.I would be interested in the 4 half moons. Great product Jarod.