COLT M16A1 FOR SALE FUNDAMENTALS EXPLAINED

Been clear of the board for a while as a consequence of relationship, dwelling renovations and an outdated car or truck resto, but I'm now getting back again into firearms and notably the AR15 type. So I suppose which makes me an old semi FNG.Many thanks for getting the effort and time to do this.  I have a number of pics with the VN era carbine m