I have taken the advice of FALARAK and RMAO for the last several days. I have decided to purchase a MEGA Lower and a parts kit from ADCO. I have noticed on the posts that for my intended useage a longer barrel (20") would be appropriate. My question is how does chambering affect the choices in bolt assembly, magazine, etc. and accuracy if I were to choose between say a 7.62 x 39 or a .223. Also what is the performance/accuracy difference between Free Float versus Fixed. Sorry if this has been addressed recently.
Thanks in advance,