In my other thread of a similar name, you can read my questions about selecting a buttstock and single-point sling attachment.
Well, I made my decision and this is what I came up with...
I went with a Cavalry Arms C1 Buttstock from Coal Creek Armory and a single-point sling adapter for an A1 length fixed buttstock from Fulton Armory. For the sling, I simply utilized a "M-60"-type padded sling & HK-type hook that I had on hand. I bought a quick-release buckle and a couple of keepers from a local outdoor shop and I was set to put everything together...
The single-point sling adapter from Fulton Armory came with the sling attachment, a spacer for the end of the buffer tube, and a longer buffer tube screw to allow for the extra length of the sling attachment.
The CavArms C1 buttstock came with the buttstock, a buttplate with trapdoor, and a buffer tube screw appropriate for an A1 length buttstock.
Long story made short, I removed the A2 buttstock from my AR and, using the longer buffer tube screw supplied with the sling adapter, installed the single-point sling adapter and C1 buttstock.
I still have to adjust the length of the sling, but here's some pictures of the completed project:
Close-up of installed single-point sling adapter:
C1 Buttstock:
Close-up of sling & HK-type hook clipped in place:
Picture of the whole works: