Hey there! Finished a little earlier than expected but here’s my entry:
I don’t think they said anything about grenades in covers 
I’ve seen some covers with grenades before so I think it should be fine? But if it gets rejected I’ll edit the grenade out! Or if you want the cover asap and don’t want to wait for more time IF the first one gets rejected, then let me know and I’ll probably send over the second version by today or tomorrow!