The sentry golem

the sentry is a placeable golem that will attack hostile mobs and certain players using the type of projectile insert. To attack certain players, you add a player name in the input for the sentry targets. you can even turn off hostile mob targeting or passive mob targeting. but don't forget to refill with arrows. that's right! you would have to refill and fill the sentry with projectiles! excluding ender eyes and ender pearls. it is craftable in the crafting table by placing 2 iron blocks vertically with a dispenser on top. it is an iron pole with a cannon a top with 2 unblinking metal eyes. it has 60 hp and is immune to arrows. it can only be damaged by melee items and the mace. that's all, I hope this gets added! please vote!