Mounting weapons on the Z-8 won't be a good idea...the Z-8 itself is already a large bulky and slow flying machine, so putting it in attack roles would even increase its weight and vulnerability more.
The Z-8 serves fine unarmed, like the Pumas, Cougars and Commandos operated by European forces. However, I won't be surprised if it was cleared for machine guns and rockets...though like those Euro designs, the Z-8 assault transport would rarely carry these weapons.
The effectiveness of these weapons are also questionable especially on a large design like the Z-8.