you need to get 1000 head shots for it then you'll get it
You have to achieve the Mastery challenge for that weapon. That is, unlocking all attachments.
Yes, but very minimal.
I think it might be the tar 21 (MW2) it actually does exist
ninja pro cold bloded marthan pistol with tatical knife tar 21 silenced
Yes I would suggest trying to get the next 2 guns after it too they are better.
tar-21
This is very controversial. I truly prefer the Tar-21 over the Scar-H. The Scar-H has very little ammo and has a lot of recoil. The Tar-21 unlocks at a higher level, but it has more ammo and little recoil. The Tar-21 is overall a better weapon.
5.56mm. Same as the M16A4.
Sasme as the M16. 5.56x45mm
21 karat gold is 87.5% pure gold.
Scar-H
Possibly the TAR-21 or the Barret 50 cal