They're standard. If you buy a sling swivel stud mounted bipod it will fit your sling swivel stud.
You can pick up an uncle mike's sling swivel kit for your rifle from walmart. It's a very simple install if you have opposable thumbs and some basic tools (drill, center punch).
Walmart also sells a basic Rockmount bipod for about 40 bucks that isn't bad. Harris is better and lighter, but no problem with a Rockmount.