I don't know, and I won't be in a place to weigh my stuff for quite awhile. According to the maryland AR shooters site, the Dd weighs 8.5 oz and the LT weighs 11. Beyond that it would all depend on what kind of sling attachment you're talking about. If you use the LT rail you still have to use a pushbutton QD loop, but you can attach a fixed loop to the DD and do away with that.
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