Looking to install a sling on my AR. Probably going with a 2-point sling, but have a question regarding the attachment at the stock end. I have a Magpyl ACS-L stock, and it has a slot for a strap as well as a mounting location for a QD attachment. I've seen some straps installed in the slot, some that use a QD attachment, and several that mount to connections on the received end plate. Just wondering which method seems to work the best for a 2-point sling.

Thanks in advance.