Yes, they both can use their listed attacks as opportunity attacks.
What is a force empowered Rend?
Force-Empowered Rend is a melee attack that uses the SD’s action to perform. Using an action to make an attack would be an attack action.
What is a Battle smith?
A combination of protector and medic, a Battle Smith is an expert at defending others and repairing both materiel and personnel. To aid in their work, Battle Smiths are usually accompanied by an steel defender, a protective companion of their own creation.
Do steel defenders level up?
The hit points of the Steel Defender are based on your class level but everything else you mentioned only goes up when your Proficiency score goes up.
Can the steel defender use weapons?
Steel Defenders are creatures. By the rules as written, they can attune to magic items, and they can hold shields, and possibly weapons.
How many hit points does the UA battle Smith artificer’s?
The Iron Defender’s stat block for the Battle Smith Artificer (from Unearthed Arcana: The Artificer Returns ), under “hit points” says the following: equal to five times your level in this class + your Intelligence modifier + the Iron Defender’s Constitution modifier
Can a Gnome Battle Smith artificer ride an iron defender raw?
I don’t see any reason a gnome Battle Smith artificer (from the May 2019 UA) couldn’t ride his iron defender RAW–it’s got the appropriate anatomy and is one size larger. But how is it “Controlled”?
Can a steel defender have more hp than an artificer?
As to whether the Steel Defender should have more HP then the Artificer, it’s a guardian – it darn well should have more HP than what it’s protecting. The fact that it might not seems off.
Is the Iron defender friendly to the player?
It is friendly to you and your companions, and it obeys your commands. The Iron Defender has an INT of 4. The Dragon Talk: Sage Advice on Mounted Combat admits that this is vaguely defined, so rule at your discretion. According to Jeremy Crawford, most players make the choices for their mount if it isn’t an important NPC-tool of the DM.