hey everyone, i am needing a little insight and direction from all the AR guys on here. Here is my story and what i am after in my quest to build an AR. It all started 2 years ago with a little extra cash saved up for a new gun, i didn't know what i wanted so i started looking aorund. i always had a certain intrigue with ar's but never owned one or had been around one. and little did i know, or do i know for that matter, about the ar platform, i thought they were just a standard .223/5.56. Then i walked into the local gun shop and seen the r-15 chambered in the .204. needless to say i left with that gun that day and have since learned alot more about ar's after a little research and the will to learn. Now don't get me wrong, i practically no nothing about ar's but i know more than i did that day, and it has intrigued me to stray away from my life long bolt guns and learn what i can about the Black Rifle. Now that you made it threw all that nonsense i will get down to business. I would like to build my own ar in either a 204 or a 243 wssm, not completely decided yet. but my dilemma is this. i have watched videos and read articles and watched more videos. but i am still confused as to what i actually need to do a build. do i need certain bolt carrier group for particular caliber? What brand parts do i use, there are so many out there, it's not like my remington 700's. I have no knowledge of most manufacturers of the parts. I know i can buy an upper and buy a lower and have a gun. But i want to build it and i figure their is no better way to know a gun than put it together yourself. i am very mechanically inclined so it doesn't worry me about the level of difficulty to do it. just the level of knowledge i have on what to use, which is none. So if you guys would be so kind as to send me in the right direction i would appreciate it. sorry for the long post, i am kind of a wind bag sometimes. lol. Thank You.