I did a search last night and got all kinds of info on this. I saw a lot of opinions but didn't get a definitive answer. My LMT Defender came with a carbine buffer and shoots just fine. I am doing a mid-length build and a carbine buffer is being shipped with my lower build kit (comes standard). I would like to use an M16 BCG and thought about using a heavier buffer. Do I really need it? I have seen all the posts from folks saying a heavier buffer is better, but not many that say why you shouldn't use a carbine buffer.
Can someone elighten me please. I know it's been beat to death here, but I need to know if I REALLY need a heavier buffer.

