I am pretty much a newbie with advanced gun terminology and the differences between one gun and another. Basically I have shot a few rifles and a few pistols and other than kick and range I don't know much about them. I have decided to go into the army and I have a few months before I ship out, I want to have a little better chance to get the expert medal in rifle shooting and would like to know if anyone here knows what kind of rifle I should use that would give a similar effect to the M4 Carbine. At least I think that is what I'll be using. Any information will be appreciated.