Hello,

I am new to this great site and am just starting to get into AR's and learning all the in's and out's. I have done a few searches on various things and the more I read the more questions and minor confussion my little pea brain has.

So, I was hoping to have a running discussion on AR's and different parts.

Thanks for any answers and replies you offer ahead of time I really appreciate it, it is one thing I really like about this site (people respect each other, take the time to answer questions etc.).

First question... what is the biggest difference in barrel length? if you were building an AR why buy a 16" verses a 14" etc. does length give a more stable/longer shot? shorter for closer shots maybe?

second question... what are some of the main differences in hand guards? I see hundreds of different types, is it purely looks or is there some degree of protection from heat? Do longer ones offer more stability wheen shooting? (being able to hold farther out)

Ok, that all for the moment, but there will be more.