Anyone using these and have one they recommend?

I have an Atlas bipod with the QD and would like to use it on all my rifles, just not my chassis rifle with a rail.

Here is a couple I have stumbled across so far.

http://www.mountsplus.com/AR-15_Acce...3-MIM-SRA.html
http://www.mountsplus.com/AR-15_Acce...71RA00-BK.html