Re: M16 Revisited..... ( 1 )
The flash supressor with the three prong was the M16 was the initial M16 and then an updated version had the newer flash suppressor--of course the Army had the updated version.
When the M16A2 came around in 86/87, the Corps got it first as they did the later A3 and A4.
We, the Corps, also received the Beretta before the Army.
One of my many MOSs included 2111 -Small Arms Repairmen