(adsbygoogle = window.adsbygoogle || []).push({}); and stay at the level 70 will it get reset? and if not will I have all of the weapons/challenges unlocked? thanks guys

All challenges and titles and guns ammos and perks and classes stay the same. it just puts you at the prestige before the one you want at a prestiging level then you prestige to be one with all your guns ammos titles and challenges already done.
Your Welcome.

Yes...

Goodluck.