Went out to Cabelas today and purchased a Hogue grip for my AR-15. I have a problem though, i don't know how to remove the old grip, or with what. I turned it over and looked down it and I don't know what to remove it with. it looks like a circle to me, and I don't know how to remove it. I would surely apprecaite some help.
The handle is hollow to allow access to the mounting/retaining screw. As pointed out it should ether be a regular (phillips or flat) screw or hex head/allen screw. Just make sure the tool you use is long enough.
"When in doubt [use] C4." -Jamie Hyneman (Mythbusters)
My advice to you is that you start looking at other websites like AR15.com. There are tons of information on that website to show you or tell you how to work on your AR. To be honest since changing a pistol grip is very basic and if you had a problem with something that simple then I would suggest learning as much as possible. Although AR's are very simple to work on you still need to learn the basics.