As far as Manpower goes they have officially 50k.. With 40k Hamas and 9k PIJ add the volunteers and these who will report for duty to bolster their ranks. They will easily reach 110-100k...
As for anti-tanks they have kornets..
The official numbers are in this link... Reported earlier today or yesterday (without adding these who will report duty due to the tensions)
Most of the rockets in the Gaza groups’ arsenals have been around since Operation Protective Edge in 2014, but some first came to light in 2019.
www.jpost.com