I know what your thinking "another Black Ops bashing post, here we go" and trust me i was tempted (tbh there's a lot to complain about) but this is more about continuity errors than bad design.
In the 1st mission you are supplied as standard with a rifle with an M203 under slung grenade launcher. now i remember seeing a documentary saying that the the US were still using the 'bloop gun (think thumper from MW2) during the vietnam war. a quick check (2 mins) online tells me that the M203 wasn't brought into service until '69. so why can you use it 6 years earlier in game?
as a note the same is true for the GP-25 (russian variant), you can use it in the prison escape mission but the weapon wasn't designed until '66 let alone produced.
seems like treyarch didn't even bother doing the research and just stuck them into the campaign because people like using them in multiplayer.
EDIT: if someone has info proving me wrong id be grateful
In the 1st mission you are supplied as standard with a rifle with an M203 under slung grenade launcher. now i remember seeing a documentary saying that the the US were still using the 'bloop gun (think thumper from MW2) during the vietnam war. a quick check (2 mins) online tells me that the M203 wasn't brought into service until '69. so why can you use it 6 years earlier in game?
as a note the same is true for the GP-25 (russian variant), you can use it in the prison escape mission but the weapon wasn't designed until '66 let alone produced.
seems like treyarch didn't even bother doing the research and just stuck them into the campaign because people like using them in multiplayer.
EDIT: if someone has info proving me wrong id be grateful