on a whim at a gunshow, isn't it allways) i bought a harris bipod for a little trickout job i'm currently doing. any pages of a harris bipod manual to download out there? what are some tricks of the trade to get the most out of your mounting and usage of the bipod? what is that miniature looking keyring thing hanging off the front of it, and what does it do? there are also 2 half inch by half inch cylinder shaped clips, that are on the top of both legs, that with pressure, appear to just clip on and off the legs. What the heck do they do?