Sentry
The Sentry attacks intruders with an infinite supply of bullets. Alternatively, other projectiles can be used by putting them in a passcode-protected chest or barrel below the Sentry. It has three modes and three target types that can be switched by rightclicking it. The modes are "Idle" (it will never attack), "Camouflage" (it will only activate once a target is within range) and "Aggressive" (it will always be active), with the latter two modes being available with the target types "Hostile mobs only", "Hostile mobs and players", and "Players only". A disguise module will make the Sentry disguise itself with the block inserted in the module, a speed module will increase the Sentry's attack speed, and an allowlist module will prohibit it from shooting listed players. The modules can be inserted or switched out by rightclicking a Sentry, and they can be extracted by using a Universal Block Modifier. To remove the Sentry, sneak-rightclick it.
