This month GG&G is having a sale on their XDS Bipod and mounts so I decieved to order lastweek since Bobro has been out of stock for like a year. Installing the rail to the M1A was a bitch since the front sling mount is riveted on. I had to buy a drill and use a 1/4" bit to drill out the rivets. Anyways, the bipod itself mounts easy enough - you just slide it on and turn the lock knob. It has built-in cant that you can adjust with another knob. For as heavy duty as it looks, it's quite light 17oz. I'll be taking it out to the range next weeked for a test run.