Are you having a specific problem?
See if you can find a Gun Digest Assembly/Re-Assembly manual for Semi Automatic Rifles. They're available at gun shops and you may be able to find a used one somewhere as well. I have about a half dozen of the various manuals and they are invaluable.
If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen. ― Samuel Adams