This isn't online, this is offline but then you go online, go to a private match, quit it, then go online? I seriously don't think so, too much effort for nothing but setting up a bi-pod.
Nice find, I got it to work online but the cons are: Since you have to do it so fast you can't change the settings in the private match so you are on a time limit and once the match ends the glitch stops working, Second you can't invite friends into the private match cause they get the error "Your playlist is newer then the host's" so really there is no pro to this glitch......