Unlock the challenges for them.
Unlock all the attachments and complete all challenges.
You get kills with the gun you want to unlock attachments for. If you see your challenges it will tell you what to do to unlock the attachment.
By completing challenges, or by leveling up, you can unlock:primary weaponssecondary weaponsattachmentscamo'semblemstitlesperksdeathstreakskillstreak rewardsequipmentspecial grenades
You can unlock mods by level or challenges for each separate guns! Hope This Helps!
By either completing all the challenges available in the Barracks section, or by hacking.
how do you unlock Municion viva on call of duty modern warfare mobilized
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Get to 10th prestige, unlock everything (challenges, emblems, titles, weapon challenges and camos, etc....)
to get all emblems you need to complete a certain of challenges for each weapons, which is really hard...
You unlock it at level 36.
In "Call of Duty: Modern Warfare 2," the red tiger camo for the Intervention sniper rifle cannot be unlocked without completing specific challenges or requirements. If you want to unlock it without actively playing, you might consider using a glitch or exploit, but these methods can be inconsistent and may be patched in future updates. Generally, actively completing the required challenges is the only legitimate way to unlock the camo.