The Bunker Mailbox - 1/8 Inch Lighter Weight High Security Mailbox
The Bunker — Rugged Mail Protection
10" x 10.25" x 20" @ 38 LBS.
Formerly known as the M1-LT Mailbox.
We originally named it after the Abrams tank because our mailboxes are truly “built like a tank!” However, most people aren’t familiar with that military vehicle, so we wanted a name that instantly communicates strength and protection.
That’s how The Bunker was born. Just as soldiers relied on bunkers in battle for safety and security, this mailbox is designed to give you peace of mind. Rugged, resilient, and ready for anything—it’s built to protect your mail like it’s under heavy guard.
How It Works
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The mail carrier inserts incoming mail into the slot at the top (10” W x 1.75” H).
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Mail drops into the always-locked compartment.
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Only you have the key—your mail waits safely inside until you retrieve it.
The Bunker has four pre-drilled holes on the bottom. These holes are 4 ?” apart. They are made to fit our Bunker Posts. You can also install it on wood, metal, or masonry surfaces.
Outgoing Mail (Optional)
- This is a “Limited Service” mailbox, designed for incoming mail only.
- Outgoing mail option available (adds a 1/8" flag and slot beneath incoming slot).
- Holds 1–4 outgoing envelopes.
- Outgoing mail is not lockable and must stick out ~1 inch for carrier pickup.
- No concealment door like our larger models.
Special Features of The Bunker
- 38 lbs. of solid steel for security
- 1” continuous welded steel hinge
- All hand-welded design (no spot welds or rivets)
- Incoming slot: 1 ¾" x 10"
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7.5" recessed slot depth to:
- Accept small packages
- Prevent hand entry
- 7-pin tubular pick-proof lock (upgradable)
- High-performance powder coating (inside & out)
- Standard colors: Slate Gray or Glossy Black
- Special colors available at an additional cost
Included with Every Bunker
- Free 1 ¾" vinyl adhesive address numbers for the front door
- Request specific numbers at time of order
- 3" side numbers available
- Pre-drilled for our steel posts or racks or other surfaces you might have
- Can be installed on a breakaway (surface mount) post
Custom Options & Upgrades
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Lock upgrades:
- Slam Lock ? Accept larger packages through the locked door
- Medeco Lock® ? Hardened steel upgrade
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Color upgrades:
- Any custom solid powder coating color at an additional cost
- Online color chart available HERE
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Outgoing mail option:
- Add flag + outgoing slot (1–4 envelopes, non-locking)
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Post options:
- In-Ground steel post (2.5" x 2.5" x 57")
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Surface Mount steel Post (2.5" x 2.5" x 36")
- Curb Mounted (existing sidewalk)
- Curb Mounted (existing sidewalk)
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Rear door access (2 options, same price):
- Front door replaced with welded steel plate
- Front and rear doors keyed alike
- If upgraded lock is purchased, it is included on both doors
- Can be installed on a breakaway (surface mount) post
Shipping and Lead Time
All Fort Knox Mailboxes are built in the USA and ship directly from our facility in Grants Pass, Oregon. Each unit is fabricated for maximum quality and securely packaged to handle the stress of transit.
Production Time
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In stock: The Bunker Mailbox ships the same or next business day.
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Not in stock: Production may take up to 10 business days.
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Multiple units: Contact us for current lead times.
Transit Time
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FedEx Ground: Typically, 2–5 business days, depending on location.
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Freight: 1–10 business days for oversized or multi-unit shipments (quote required).
Shipping Carrier
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FedEx Ground for approx. 1–6 Bunker mailboxes without steel racks.
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Freight for 7+ units or orders including racks (often more cost-effective for larger quantities).
Tracking
Tracking information is automatically emailed as soon as your order leaves our facility in Oregon.
Need it sooner?
Rush builds are sometimes available, depending on the production schedule. Contact us before ordering to confirm the fastest ship date and current stock status.