diff --git a/Content.Server/Weapon/Ranged/Ammunition/Components/AmmoComponent.cs b/Content.Server/Weapon/Ranged/Ammunition/Components/AmmoComponent.cs
index e383a9f239..dce1577c41 100644
--- a/Content.Server/Weapon/Ranged/Ammunition/Components/AmmoComponent.cs
+++ b/Content.Server/Weapon/Ranged/Ammunition/Components/AmmoComponent.cs
@@ -114,6 +114,7 @@ namespace Content.Server.Weapon.Ranged.Ammunition.Components
         Pistol,
         A35, // Placeholder?
         LRifle,
+        HRifle,
         Magnum,
         AntiMaterial,
         Shotgun,
diff --git a/Resources/Prototypes/Entities/Mobs/Player/silicon.yml b/Resources/Prototypes/Entities/Mobs/Player/silicon.yml
index 743b8fa966..f8306829ce 100644
--- a/Resources/Prototypes/Entities/Mobs/Player/silicon.yml
+++ b/Resources/Prototypes/Entities/Mobs/Player/silicon.yml
@@ -151,3 +151,61 @@
   - type: Repairable
     fuelcost: 15
     doAfterDelay: 8
+
+- type: entity
+  name: onestar mecha
+  id: Onestar
+  parent: PlayerSiliconBase
+  components:
+  - type: Drone
+    tools:
+      - id: Minigun
+      - id: EnergySword
+      - id: LauncherMultipleRocket
+      - id: XrayCannon
+  - type: UserInterface
+    interfaces:
+    - key: enum.StrippingUiKey.Key
+      type: StrippableBoundUserInterface
+  - type: GhostTakeoverAvailable
+    makeSentient: true
+    name: Onestar Mecha
+    description: You are an experimental mecha created by who-knows-what, all you know is that you have weapons and you detect fleshy moving targets nearby...
+    rules: Use your weapons to cause havok. You are an antagonist.
+  - type: MovementSpeedModifier
+    baseWalkSpeed : 3
+    baseSprintSpeed : 2
+  - type: MobState
+    thresholds:
+      0: !type:NormalMobState {}
+      1000: !type:DeadMobState {}
+  - type: Sprite
+    drawdepth: Mobs
+    netsync: false
+    layers:
+    - state: onestar_boss
+      sprite: Mobs/Silicon/onestar.rsi
+    - state: onestar_boss_screen
+      sprite: Mobs/Silicon/onestar.rsi
+      shader: unshaded
+  - type: MovementIgnoreGravity
+  - type: Fixtures
+    fixtures:
+    - shape:
+        !type:PhysShapeCircle
+        radius: 1
+      mass: 500
+      mask:
+      - SmallImpassable
+      - MobImpassable
+      - VaultImpassable
+      - Impassable
+      layer:
+      - Opaque
+  - type: Appearance
+    visuals:
+    - type: DamageStateVisualizer
+      rotate: true
+      normal: onestar_boss  
+      dead: onestar_boss_wrecked
+  - type: CombatMode
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Cartridges/hrifle.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Cartridges/hrifle.yml
new file mode 100644
index 0000000000..46c03f6a14
--- /dev/null
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Cartridges/hrifle.yml
@@ -0,0 +1,26 @@
+- type: entity
+  id: CartridgeHRifleBase
+  name: cartridge (.20 rifle)
+  parent: BaseCartridge
+  abstract: true
+  components:
+  - type: Ammo
+    caliber: HRifle
+  - type: Sprite
+    netsync: false
+    noRot: false
+    sprite: Objects/Weapons/Guns/Ammunition/Casings/ammo_casing.rsi
+    layers:
+    - state: base
+      map: ["enum.AmmoVisualLayers.Base"]
+  - type: Appearance
+    visuals:
+    - type: SpentAmmoVisualizer
+
+- type: entity
+  id: CartridgeMinigun
+  name: cartridge (.10 rifle)
+  parent: CartridgeHRifleBase
+  components:
+  - type: Ammo
+    projectile: BulletMinigun
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Magazines/hrifle.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Magazines/hrifle.yml
new file mode 100644
index 0000000000..60dd1f3605
--- /dev/null
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Magazines/hrifle.yml
@@ -0,0 +1,44 @@
+- type: entity
+  id: MagazineHRifleBase
+  name: "magazine (.20 rifle)"
+  parent: BaseItem
+  abstract: true
+  components:
+  - type: RangedMagazine
+    caliber: HRifle
+    magazineType: Rifle
+    capacity: 100
+
+  - type: Sprite
+    netsync: false
+    layers:
+    - state: base
+      map: ["enum.RangedBarrelVisualLayers.Base"]
+    - state: mag-1
+      map: ["enum.RangedBarrelVisualLayers.Mag"]
+  - type: Appearance
+    visuals:
+    - type: MagVisualizer
+      magState: mag
+      steps: 2
+      zeroVisible: false
+
+
+- type: entity
+  id: MagazineMinigun
+  name: "Minigun magazine box (.10 rifle)"
+  parent: MagazineHRifleBase
+  components:
+  - type: RangedMagazine
+    fillPrototype: CartridgeMinigun
+    magazineType: Box
+    capacity: 1000
+
+  - type: Sprite
+    sprite: Objects/Weapons/Guns/Ammunition/Magazine/LRifle/l_rifle_box.rsi
+  - type: Appearance
+    visuals:
+    - type: MagVisualizer
+      magState: mag
+      steps: 8
+      zeroVisible: false
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/hrifle.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/hrifle.yml
new file mode 100644
index 0000000000..7352f8fbee
--- /dev/null
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/hrifle.yml
@@ -0,0 +1,21 @@
+- type: entity
+  id: BulletHRifle
+  name: bullet (.20 rifle)
+  parent: BulletBase
+  abstract: true
+  components:
+  - type: Projectile
+    damage:
+      types:
+        Piercing: 28
+
+- type: entity
+  id: BulletMinigun
+  name: minigun bullet (.10 rifle)
+  parent: BulletHRifle
+  abstract: true
+  components:
+  - type: Projectile
+    damage:
+      types:
+        Piercing: 5
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/explosives.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/explosives.yml
index 623c4c179d..a78142219a 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/explosives.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/explosives.yml
@@ -84,3 +84,19 @@
   - type: Appearance
     visuals:
     - type: SpentAmmoVisualizer
+
+- type: entity
+  id: SlowRocketAmmo
+  name: PG-7VL grenade "Snail-Rocket"
+  parent: BaseItem
+  description: A 1.5 warhead designed for the RPG-7 launcher. It is unusually slow.
+  components:
+  - type: Ammo
+    caliber: Rocket
+    projectile: WeakBulletRocket
+    caseless: true
+    ammoVelocity: 4.5
+  - type: Sprite
+    netsync: false
+    sprite: Objects/Weapons/Guns/Ammunition/Explosives/rpg.rsi
+    state: frag
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/HMGs/hmgs.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/HMGs/hmgs.yml
new file mode 100644
index 0000000000..e06db76df7
--- /dev/null
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/HMGs/hmgs.yml
@@ -0,0 +1,77 @@
+- type: entity
+  name: heavy machinegun
+  parent: BaseItem
+  id: HMGBase
+  description: Spray and pray
+  abstract: true
+  components:
+  - type: Sprite
+    netsync: false
+  - type: Icon
+    state: icon
+  - type: Item
+    size: 24
+  - type: MagazineBarrel
+    currentSelector: Automatic
+    allSelectors:
+    - Automatic
+    caliber: HRifle
+    magazineTypes:
+    - Box
+    fireRate: 20
+    minAngle: 10
+    maxAngle: 45
+    angleIncrease: 10
+    angleDecay: 60
+    magNeedsOpenBolt: false
+    soundGunshot:
+      path: /Audio/Weapons/Guns/Gunshots/lmg.ogg
+    soundEmpty:
+      path: /Audio/Weapons/Guns/Empty/lmg_empty.ogg
+    soundRack:
+      path: /Audio/Weapons/Guns/Cock/lmg_cock.ogg
+    soundBoltOpen:
+      path: /Audio/Weapons/Guns/Bolt/rifle_bolt_open.ogg
+    soundBoltClosed:
+      path: /Audio/Weapons/Guns/Bolt/rifle_bolt_closed.ogg
+    soundAutoEject:
+      path: /Audio/Weapons/Guns/EmptyAlarm/lmg_empty_alarm.ogg
+    soundMagInsert:
+      path: /Audio/Weapons/Guns/MagIn/lmg_magin.ogg
+    soundMagEject:
+      path: /Audio/Weapons/Guns/MagOut/lmg_magout.ogg
+
+- type: entity
+  name: minigun
+  id: Minigun
+  parent: HMGBase
+  description: Vzzzzzt! Rahrahrahrah! Vrrrrr!
+  components:
+  - type: Sprite
+    sprite: Objects/Weapons/Guns/HMGs/minigun.rsi
+    layers:
+    - state: base
+      map: ["enum.RangedBarrelVisualLayers.Base"]
+    - state: bolt-closed
+      map: ["enum.RangedBarrelVisualLayers.Bolt"]
+  - type: Icon
+    sprite: Objects/Weapons/Guns/HMGs/minigun.rsi
+  - type: Item
+    size: 24
+    sprite: Objects/Weapons/Guns/HMGs/minigun.rsi
+  - type: RangedWeapon
+  - type: MagazineBarrel
+    magFillPrototype: MagazineMinigun
+    fireRate: 15
+    minAngle: 0
+    maxAngle: 15
+    angleIncrease: 15
+    angleDecay: 60
+  - type: Appearance
+    visuals:
+    - type: BarrelBoltVisualizer
+    - type: MagVisualizer
+      magState: mag
+      steps: 4
+      zeroVisible: true
+
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Launchers/launchers.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Launchers/launchers.yml
index 59f2cfad25..45559d7854 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Launchers/launchers.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Launchers/launchers.yml
@@ -82,3 +82,45 @@
       magState: mag
       steps: 1
       zeroVisible: true
+
+- type: entity
+  name: multiple rocket launcher
+  parent: LauncherBase
+  id: LauncherMultipleRocket
+  description: A modified ancient rocket-propelled grenade launcher.
+  components:
+  - type: Sprite
+    sprite: Objects/Weapons/Guns/Launchers/rocket.rsi
+    layers:
+      - state: base
+        map: ["enum.RangedBarrelVisualLayers.Base"]
+      - state: mag-0
+        map: ["enum.RangedBarrelVisualLayers.Mag"]
+  - type: Item
+    size: 24
+    sprite: Objects/Weapons/Guns/Launchers/rocket.rsi
+  - type: RangedWeapon
+  - type: RevolverBarrel
+    caliber: Rocket
+    currentSelector: Automatic
+    allSelectors:
+    - Single
+    fillPrototype: SlowRocketAmmo
+    fireRate: 6
+    minAngle: 0
+    maxAngle: 15
+    angleIncrease: 15
+    angleDecay: 60
+    capacity: 30
+    soundEmpty:
+      path: /Audio/Weapons/Guns/Empty/empty.ogg
+    soundGunshot:
+      path: /Audio/Weapons/Guns/Gunshots/rpgfire.ogg
+    soundInsert:
+      path: /Audio/Weapons/Guns/MagIn/batrifle_magin.ogg
+  - type: Appearance
+    visuals:
+    - type: MagVisualizer
+      magState: mag
+      steps: 1
+      zeroVisible: true
diff --git a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Projectiles/projectiles.yml b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Projectiles/projectiles.yml
index 04bc34c0a2..72258eefcf 100644
--- a/Resources/Prototypes/Entities/Objects/Weapons/Guns/Projectiles/projectiles.yml
+++ b/Resources/Prototypes/Entities/Objects/Weapons/Guns/Projectiles/projectiles.yml
@@ -196,6 +196,28 @@
     color: orange
     energy: 0.5
 
+- type: entity
+  id: WeakBulletRocket
+  name: weak rocket
+  parent: TriggerBulletBase
+  abstract: true
+  components:
+  - type: Sprite
+    netsync: false
+    sprite: Objects/Weapons/Guns/Projectiles/rocket.rsi
+    state: frag
+  - type: ExplodeOnTrigger
+  - type: Explosive
+    devastationRange: 0
+    heavyImpactRange: 0
+    lightImpactRange: 1
+    flashRange: 10
+  - type: PointLight
+    radius: 3.5
+    color: orange
+    energy: 0.5
+
+
 - type: entity
   id: BulletGrenadeBaton
   name: baton grenade
diff --git a/Resources/Textures/Mobs/Silicon/onestar.rsi/meta.json b/Resources/Textures/Mobs/Silicon/onestar.rsi/meta.json
new file mode 100644
index 0000000000..088492c49f
--- /dev/null
+++ b/Resources/Textures/Mobs/Silicon/onestar.rsi/meta.json
@@ -0,0 +1,193 @@
+{
+  "version": 1,
+  "license": "CC-BY-SA-3.0",
+  "copyright": "https://github.com/discordia-space/CEV-Eris/pull/3768",
+  "size": {
+    "x": 64,
+    "y": 64
+  },
+  "states": [
+    {
+      "name": "onestar_boss",
+      "directions": 4
+    },
+    {
+      "name": "onestar_boss_unpowered"
+    },
+    {
+      "name": "onestar_boss_wrecked",
+      "delays": [
+        [
+          3,
+          0.9,
+          0.9,
+          0.9,
+          0.9,
+          0.9
+        ]
+      ]
+    },
+    {
+      "name": "onestar_boss_screen",
+      "directions": 4,
+      "delays": [
+        [
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1
+        ],
+        [
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1
+        ],
+        [
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1
+        ],
+        [
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          6,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1,
+          0.1
+        ]
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss.png b/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss.png
new file mode 100644
index 0000000000..a4ee0e46eb
Binary files /dev/null and b/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss.png differ
diff --git a/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss_screen.png b/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss_screen.png
new file mode 100644
index 0000000000..6e33c292b0
Binary files /dev/null and b/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss_screen.png differ
diff --git a/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss_unpowered.png b/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss_unpowered.png
new file mode 100644
index 0000000000..0ed394772b
Binary files /dev/null and b/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss_unpowered.png differ
diff --git a/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss_wrecked.png b/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss_wrecked.png
new file mode 100644
index 0000000000..3a0ba0d2f8
Binary files /dev/null and b/Resources/Textures/Mobs/Silicon/onestar.rsi/onestar_boss_wrecked.png differ
diff --git a/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/base.png b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/base.png
new file mode 100644
index 0000000000..3b435f7b88
Binary files /dev/null and b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/base.png differ
diff --git a/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/bolt-closed.png b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/bolt-closed.png
new file mode 100644
index 0000000000..3b435f7b88
Binary files /dev/null and b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/bolt-closed.png differ
diff --git a/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/bolt-open.png b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/bolt-open.png
new file mode 100644
index 0000000000..3b435f7b88
Binary files /dev/null and b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/bolt-open.png differ
diff --git a/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/holstered.png b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/holstered.png
new file mode 100644
index 0000000000..03d631ec3f
Binary files /dev/null and b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/holstered.png differ
diff --git a/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/icon.png b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/icon.png
new file mode 100644
index 0000000000..3b435f7b88
Binary files /dev/null and b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/icon.png differ
diff --git a/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/meta.json b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/meta.json
new file mode 100644
index 0000000000..9ff1465562
--- /dev/null
+++ b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/meta.json
@@ -0,0 +1,61 @@
+{
+  "version": 1,
+  "license": "CC-BY-SA-3.0",
+  "copyright": "https://github.com/tgstation/tgstation/commit/a39e3f3f1f351e3be5ae955c4de3a2e8889e191b",
+  "size": {
+    "x": 32,
+    "y": 32
+  },
+  "states": [
+    {
+      "name": "base",
+      "delays": [
+        [
+          0.1,
+          0.1,
+          0.1,
+          0.1
+        ]
+      ]
+    },
+    {
+      "name": "holstered"
+    },
+    {
+      "name": "notholstered"
+    },
+    {
+      "name": "bolt-closed",
+      "delays": [
+        [
+          0.1,
+          0.1,
+          0.1,
+          0.1
+        ]
+      ]
+    },
+    {
+      "name": "bolt-open",
+      "delays": [
+        [
+          0.1,
+          0.1,
+          0.1,
+          0.1
+        ]
+      ]
+    },
+    {
+      "name": "icon",
+      "delays": [
+        [
+          0.1,
+          0.1,
+          0.1,
+          0.1
+        ]
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/notholstered.png b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/notholstered.png
new file mode 100644
index 0000000000..4f3a4a9c65
Binary files /dev/null and b/Resources/Textures/Objects/Weapons/Guns/HMGs/minigun.rsi/notholstered.png differ