you have to rank up to earn game modes, weapons, perks, and equipment
to get all emblems you need to complete a certain of challenges for each weapons, which is really hard...
you level up and earn them all
Unlock all the attachments and complete all challenges.
You get it all at a certain level
Unlock the challenges for them.
WhEn YoU pReStIgE iN mOdErN wArFaRe 2 YoU dOn'T gEt AnYtHiNg, YoU aCtUaLlY lOsE aLl Of YoUr WeApOnS. NoW aFtEr YoU rEaD tHiS lOoK aT mY pRoFiLe.
Nothing happens other than getting the achievements and trophies in modern warfare 2. But in modern warfare 1, you get to unlock certain cheat codes that can be used during the game.
65 or 70 i play mw2
you unlock it by doing multiplayer it just matters how much kills, or falling, and random things you do
Like with any gun title, you must unlock all the attachments for it.
You don't do missions to unlock weapons you unlock weapons by leveling up.
Yes, they are all used in real life warfare. Although some are not currently used such as the Model 1887.