When serious firearm protection, fire defense, and burglary resistance matter, the Steelwater Heavy Duty 20 Long Gun Safe (SW592818) delivers uncompromising performance. Built for homeowners, collectors, and small businesses who demand maximum strength, this safe combines 12-gauge steel construction, advanced locking technology, and industry-leading fire protection into one premium security solution.

Designed to exceed California Department of Justice (DOJ) residential security container standards, the SW592818 is engineered to safeguard firearms, valuables, documents, and heirlooms from theft, fire, smoke, and water damage. With its 20-long gun maximum capacity (recommended 12–16 for optimal spacing), this safe offers both protection and flexibility for growing collections.

Built Like a Vault: Heavy-Duty Construction & Security

At the core of the SW592818 is a rugged 12-gauge steel body paired with a 4 7⁄8″ composite door, reinforced by dual layers of fireboard. The door is secured by ten massive 1.5″ solid steel locking bolts, delivering four-sided bolt coverage that resists prying, punching, and brute-force attacks.

Steelwater’s gear-driven lock and bolt system adds another layer of strength, ensuring smooth operation while dramatically increasing resistance to forced entry. In the event of a burglary attempt, the internal spring-loaded re-locking bolt automatically secures the safe if the lock is compromised.

To further deter sophisticated attacks, the SW592818 features an oversized drill/ballistic-resistant hard plate, protecting the digital lock, re-locker, gear drive, and internal linkages.

Fire Protection You Can Trust

Fire doesn’t wait—and neither should your protection. This Steelwater safe offers 60 minutes of fire protection at 1875°F, reinforced by double-layer fireboard in the walls, ceiling, floor, and door jambs.

A heat-activated expandable door seal expands up to eight times its size during a fire, sealing out smoke, flames, and water from fire suppression efforts. This makes the SW592818 ideal not only for firearms but also for safeguarding important documents, cash, electronics, and irreplaceable valuables.

Smart Storage with Premium Interior Features

Inside, the fully upholstered grey interior is thoughtfully designed for organization and versatility. The two-section gun rack holds up to 10 long guns per section, while four adjustable/removable shelves allow you to customize storage for optics, ammunition, jewelry, or documents.

Additional premium touches include:

• Automatic interior LED lighting for clear visibility

• Custom door organizer kit for handguns and accessories

• Free 200-gram rechargeable silica gel Dry Pack to control moisture

• Pre-drilled dehumidifier port for optional humidity management

Advanced Locking Options: EMP-Resistant Security

The SW592818 comes standard with an E.M.P.-Proof Digital Keypad, ensuring reliable access even in extreme conditions. Features include:

• Chrome keypad with LED backlighting

• Capacitive touch technology

• Two programmable user codes (3–8 digits)

• Non-volatile memory

• External battery compartment (9-volt battery required)

• Double-bitted emergency bypass key protected by a drill-resistant hard plate

For those seeking next-level access control, Steelwater offers an optional X3 Biometric E.M.P.-Proof Keypad, allowing:

• Fingerprint, keypad, or key entry

• Storage of up to 200 fingerprints

• One programmable numerical code

• Emergency bypass key access

Key Features

• Holds up to 20 long guns (recommended 12–16)

• 12-gauge steel construction

• 10 solid steel 1.5″ locking bolts

• 60-minute fire rating at 1875°F

• Gear-driven locking system with re-locker

• Drill/ballistic-resistant hard plate

• Heat-activated fire and smoke seal

• DOJ-compliant residential security container

• LED interior lighting and door organizer

• Reinforced anchor holes for floor mounting

Warranty

Steelwater Safes are backed by a Limited Lifetime Warranty covering defects in materials and workmanship. Fire and burglary protection coverage varies by incident—always review the manufacturer warranty documentation for full details.

Product Specifications

• Exterior Dimensions (H×W×D): 59″ × 28″ × 18″ (Add 3″ for handle)

• Interior Dimensions (H×W×D): 56 ¼″ × 25 3⁄8″ × 14 ¼″

• Usable Interior Depth: 11 7⁄8″

• Maximum Long Gun Capacity: 20 (10/10)

• Recommended Capacity: 12–16 long guns

• Weight: 453 lbs

Why Choose the Steelwater SW592818?

If you want a serious gun safe with professional-grade protection, the Steelwater Heavy Duty 20 Long Gun Safe delivers unmatched value. It combines strength, fire resistance, advanced locking technology, and customizable storage—making it an ideal solution for homeowners, firearm collectors, and security-conscious buyers.