Is there a thread that has a list of abbreviations for like FSB,CH,etc
I have seen this question asked before, and the answer is consistently no, because you should be reading enough to gradually learn all of the acronyms that are commonly used on this site.
In general, I have observed that folks are quite generous about clarifying specific individual abbreviations or acronyms when politely asked.
FSB - Front Sight Base.
CH - Charging Handle.
BCG - Bolt Carrier Group.
LPK - Lower Parts Kit.
URG - Upper Receiver Group.
Those are some of the most common abbreviations that come to mind at the moment…