How to create obj_minisentry in hammer?

Right now I’m trying to create a mini sentry in hammer, but it refuses to work, and ent_create obj_minisentry in game wont create one either, though the game says the mini sentry is supposedly “obj_minisentry”, would anyone know how to make one properly?

If is for the HL:S entity, is called monster_sentry (the green one at the floor), or monster_miniturret for the small ceiling (or floor) turret.