Is a mac10 good.

You can find information about the guns here. The mac10 is ok, but it will run out of ammunition quickly if you do not have the scavenger perk.

 

It depends on your playstyle. The MAC-10 has worse accuracy while aimed, making it a better weapon for close range combat. However, the hip accuracy excels.
The weapon does the same damage as the M16 and M4A1, with a higher firerate, meaning that it will kill more quickly. It has a reload of around 3 seconds, and has a magazine of 30 rounds.
However, because of its high firerate, you will find yourself running out of ammo quite quickly. To remedy this, you can get donor items/ranks like the perk scavenger, or the ranks VIP/MVP. Otherwise, reserve this weapon for FFA, where quick deaths mean an instant ammo refill.

 

Mac-10 is good.
Most people hate the smgs because they are not made for camping and don't go far.
To balance this, they have a great hip fire accuracy and high firing rate, with the low damage.