The sling pictured can be converted to a single point or two point sling. The type is just a matter of your personal preference. They have several videos on their site you can check out, as do many of the sling manufacturers. I choose that one because it fit my needs, plus I wasn't paying $50 or more for a one inch piece of nylon strap like some companies put out. You can mail them again and ask about the stock, mine is not collapsible.