The FN FAL in FO3, is named the Assault Rifle. Just like how the "AK-47" is called the Chinese Assault Rifle. The FN FAL in FO3, just doesn't have the handle like the other FAL's have had. They are the same gun. There are plenty of examples of FN FAL's without the handle.
It's not an FN FAL it's a HK G3 variant, or more precisely the Mexican CETME assault rifle.
http://theoutdoorsonline.com/images/guns_006.jpg
See a resemblance?
Anyways if everyone wants to get all picky about what a modern gun is, or keep saying that a timeline split just stops weapon manufacturing altogether, then why can't the game include the M60 or the M16? They were designed in the 50's so they would fit right in.
Maybe the M79 Grenade launcher as well? I can see how even that would be a stretch if we supposedly stopped using conventional weaponry altogether when our timeline split from the FO universe's, but why the hell not?
Even the PTRS-41 was made in 1938 if we have to sideline the Bozar/M107.
My point is, I don't care for the energy/plasma based weapons, so I don't use them, if New Vegas was to have a few modern guns, would that really ruin the lore for you? No one complains about old guns being in Modern Warfare :rolleyes: