M4 problems

first of all -why does the shop say the package doesnt contain a battery, but mine came with a battery in the box and now i have 2 batteries. second of all- why did they not include in the description along with the glazing words of that delta armory bravo m4a1 RIS Aeg that the hanguard comes wobbly from the box? i never had such a bad experience with airsoft.online.cz or how its called