Anti Projectile Automatic Shield or A.P.A.S is alevitating shield that can float around the Wielder using ancient technology. Requiring 2 short rest to give it a required settings to recognize you as the Wielder, this will turn into 1 short rest if you are a Artificer or a Warforge that understand it's system. The wielder gets +2 to their AC and doesn't require to hold it. 

As a reaction the wielder can cast [Shield] for 3 times before needing to be recharged or repaired for a short rest. When the user moved the spell ends. Fire ammunition for 30-90ft dealing 1d10 Piercing Damage as an action, needed to be reloaded after 3 shot for 1 action, when reloading it cannot cast shield. As a bonus action the shield can be sent to any creature you see transferring the +2 AC but you still required to use your action to shot and reaction to cast [Shield]

Shields require the Utilize action to Don or Doff. You gain the Armor Class benefit of a Shield only if you have training with it.

Notes: Damage: Piercing, Required a long rest to attune, short rest if you are a Warforge or an Artificer