okay so i tried what you suggested and the only difference being that i used ubuntu as the operating system to build from scratch instead of Cent OS. But the file size for chan_sip is still 3.9Mb. So still not sure what needs to be done. I am not sure exactly if building in cent OS would make a difference.
Also not sure if this makes a difference but for my version of FreePBX 12.0.76.2 you can switch between versions of asterisk and I am using 13. I can only find one chan_sip when I search the directories. So I am assuming that if it is using asterisk 13 that's the only place is referencing the chan_sip. I thought if there are multiple locations since it supports multiple versions of asterisk then there would be a possibility of a few different sized chan_sip files in different locations. No such luck.
Thanks