"...a socom 18..." A real SA Inc. marketing Dept. carbine or a Norinco copy? Not that it should matter. If you wanted a rifle for extreme accuracy, you should have bought a rifle for that.
In any case, as mentioned, buy some good ammo and shoot it before you do anything. Just remember that it's not a target rifle. It'll need a trigger job just like any other commercial firearm.
It would appear its the Dominion Arms model from Canada Ammo.