Anything from 3/5 would have a UIC between M11181 and M11187. If the black mark in your picture is an L, Lima 3/5 would have UIC M11187.
M00880 is MACS-1 MACG-38. Or in plain terms, Marine Air Control Squadron 1, Marine Air Control Group 38, based on MCAS Yuma, AZ
Anyway, there is the information as laid down by the Marine Corps, whether or not you choose to accept it is up to you.
Cheers