Each firearm in Hellraiser Revival accepts attachments that change how it handles, hits, or reloads. Some sit on the merchant’s buy list once she appears in the right area, while others are locked inside lockers and safes that need a code or a lockpick. Grab them on your first visit, since returning to earlier areas is often impossible.
Quick answer: Most upgrades are bought from the merchant; the rest are found in locked containers. The locker and safe codes you need are 1952 (SMG), 1923 (Revolver), and 9606 (graveyard safe).
All weapon upgrades and how to get them
| Upgrade | Weapon | Effect | Where to get |
|---|---|---|---|
| Laser Pointer | SMG | Reduces hip-fire spread | Snake key locker, code 1952 |
| Heavy Foregrip | SMG | Reduces firing spread | Merchant, 180 coins |
| Drum Magazine | SMG | Capacity 31 → 48 | Merchant |
| Extended Mag Tube | Shotgun | Capacity → 8 shells | Merchant, 200 coins |
| Dragon Breath Rounds | Shotgun | Ignites enemies | Merchant, 360 coins |
| Full Choke | Shotgun | More damage per shell | Safe in dark shack (lockpick) |
| Double Drum Magazine | Assault Rifle | Capacity → 61 | Behind spinning gears |
| AP Rounds | Assault Rifle | Better armor penetration | Merchant, 180 coins |
| Hollowpoint Rounds | Revolver | Higher dismemberment | Club locker, code 1923 |
| Extended Magazine | Pistol | Capacity → 15 | Merchant, 180 coins |
| Oversized Magazine Release | Pistol | Larger pistol magazine | Graveyard safe, code 9606 |
| Rifled Barrel | Pistol | Reduces sway | On top of a sewer locker |
Upgrades you buy from the merchant
Several attachments only appear on the merchant’s buy list, and her inventory grows as the story moves forward. The SMG, shotgun, assault rifle, and pistol each have a purchasable option worth picking up when you can spare the coins.
- SMG Heavy Foregrip (180 coins): reduces bullet spread during fire, making hip-fire more reliable. It becomes available after you encounter the merchant by the trio of gates, one of which lacks a part.
- Shotgun Extended Mag Tube (200 coins): increases the shotgun’s capacity to 8 shells. The merchant stocks it when stationed beside the cemetery’s three locked gates.
- Shotgun Dragon Breath Rounds (360 coins): sets enemies on fire for extra damage, which makes it the strongest pick for boss fights.
- Assault Rifle AP Rounds (180 coins): adds penetration that helps against fully armored enemies. It is optional, so skip it if coins are tight.
- Pistol Extended Magazine (180 coins): bumps the magazine to 15 rounds, mostly easing inventory and reload pressure.
Once purchased, each attachment shows up in the weapon customization menu and can be equipped immediately.
SMG: Laser Pointer location and code
The Laser Pointer fixes the SMG’s biggest weakness. In its stock state the weapon sprays wildly from the hip, and even close shots miss. With this attachment the aim steadies and the spread shrinks, turning the SMG into a reliable close-range gun.
It sits behind the door that needs the Snake key. This is the point where you hand the first heart to Sunny and ride the elevator up to a new club. When the elevator doors open, the Snake key door is directly ahead. Follow the campaign objectives to pick up the key, open the door, and you will find a locked locker inside. Enter 1952 to open it and take the Laser Pointer.
The Laser Pointer and the Drum Magazine cannot be equipped on the SMG at the same time. The Drum Magazine lifts capacity from 31 to 48 rounds, but the accuracy gains from the Laser Pointer are the better trade.
Revolver: Hollowpoint Rounds location and code
Hollowpoint Rounds are the only attachment the Revolver needs. The gun already hits hard, and this pushes its dismemberment power higher. It is tucked in a different locker and room inside the same club that held the Snake key.
Shotgun: Full Choke location
Full Choke is the last piece for the shotgun and raises the damage each shell deals. It does not affect the burn damage from Dragon Breath rounds, so the two work on separate parts of the gun.
A safe in the dim shack past the gate without a head statue contains the attachment. Open the gate and speak with the bald lady inside. Keep moving forward, then make a sharp right before the well to find the shack. Use a lockpick on the safe to obtain the attachment.
Assault Rifle: Double Drum Magazine location
There are two magazine extenders for the assault rifle, and the Double Drum Magazine is the better one, pushing capacity to 61 rounds. It rests on a side path rather than the main route.
Pistol: Rifled Barrel and Oversized Magazine Release
The pistol has two upgrades hidden in the world on top of the Extended Magazine you buy from the merchant.
Rifled Barrel
The Rifled Barrel steadies your aim by reducing pistol sway. Once you descend into the sewers after leaving the first dance club, you encounter the merchant again. Go down the ladder, past the two lurking enemies, and locate the door into a room marked with ritual images on its wall. On entering, turn back; a locker is on your left. It cannot be opened, but the Rifled Barrel sits on top of it.
Oversized Magazine Release
A safe in the house at the graveyard’s southeastern corner contains this pistol magazine upgrade. Use 9606 to unlock it, then take the attachment before leaving the house.
With the merchant’s stock cleared and the lockers and safes emptied, every firearm can run its best setup. Keep a lockpick in reserve for the Full Choke safe, and remember the SMG forces a choice between accuracy and capacity, where the Laser Pointer is the stronger side of that trade.
