What binoculars are used that target enemies in bf4 and how to get it

You can get the binoculars by scrolling down or holding down Q. You should then be able to zoom using T.

bobfet1 already said it:

It doesn't look like there is a good way to self-cast an ammo pack.

You can adjust the range your soldier throws the package. If you look closer to the ground, you throw it in front of your own legs. This is how you can supply yourself without moving. Keep in mind that you don't have to stand exactly on your supply, it has a small range. Others, by the way, can also get supplied by this, so if you want to supply only yourself, keep in mind you need a little distance to your mates.