The Assault and Recon Strike packages will not be stackable. However, the Support strike package will be.
In addition, if you gain more than one killstreak, you can scroll through them using the D-pad to select which one you want to use first.
Robert Bowling talks about it here: http://www.youtube.com/watch?v=lBMo5DNyfbo#t=2m37s
Forgot to add this to my post. I wish there was an option to edit like normal forums...
Kills from streaks will not count toward your killstreak unless they are from the "support" strike package. However, there are little or no killstreaks that actually kill people in the support package.
Currently Being ModeratedSep 22, 2011 5:30 PM (in response to nicedrewishfela)Re: Killstreaks in MW3
Yes they even said you could choose which killstreak you want so if you have 2 uavs over a little bird gaurd you can call the little bird gaurd in before calling in the UAVs
Currently Being ModeratedSep 22, 2011 5:41 PM (in response to nicedrewishfela)Re: Killstreaks in MW3
There are 3 Seperate killstreak tiers: Assualt, Support, Specialist.
Assualt - Stakable, but resets upon death
Support - Not stakable, but doesn't reset upon death
Specialist - Earn additional perks and resets if killed
You can also cycle through killstreaks this time around.
Yea, I think this is how they have it setup.
Currently Being ModeratedSep 22, 2011 5:43 PM (in response to nicedrewishfela)Re: Killstreaks in MW3
Killstreak kills can add to more killstreaks, just like in MW2. Only now, when you earn your rewards, you can select which one you want to use first.
Also, if you earned all 3 of your Assault Rewards, and switch to a class with the Support Strike Package, the earned rewards from the Assault will carry over--meaning you can earn a total of 6 rewards, and still be able to cycle through them.