1. Introduction
This manual provides comprehensive instructions for the assembly, operation, and maintenance of your Marcree B3-10D-5 8-10 Gun Safe. Designed for secure storage of firearms, this cabinet features robust construction, an intelligent digital locking system, and flexible interior organization. Please read this manual thoroughly before installation and use to ensure proper functionality and safety.

Figure 1: Marcree 8-10 Gun Safe, showing both closed and open interior views.
2. Important Safety Information
Always secure the cabinet to the wall or floor using the pre-drilled holes to prevent tipping. Ensure all installation instructions are followed for safe use. Keep emergency keys in a secure location away from the safe and out of reach of unauthorized individuals.
3. Package Contents
Verify that all components are present before beginning assembly:
- 1x Marcree B3-10D-5 Gun Safe
- 2x Emergency Keys
- 4x Expansion Screws (for mounting)
- 1x Emergency Battery Box
- 1x User Manual
4. Setup and Assembly
The Marcree B3-10D-5 Gun Safe is designed for convenient assembly. Detailed instructions and videos are available to guide you through the process. Assembly can typically be completed within 20 minutes.
4.1 Assembly Video Guide
Video 1: Gun Cabinet Assembly Guide. This video provides step-by-step visual instructions for assembling the Marcree B3-10D-5 Gun Safe.
4.2 Step-by-Step Assembly
- Unpack all components and verify against the package contents list.
- Follow the instructions in the provided manual or the assembly video to connect the side panels, top, and bottom sections.
- Secure all connections using the provided screws.
- Install the internal components such as shelves and gun racks as desired.
- Attach the main door, ensuring proper alignment with the hinges.
4.3 Mounting the Safe
For enhanced security, the safe features five pre-drilled holes on the back and bottom for wall or floor mounting. Use the provided expansion screws to firmly secure the safe to a stable surface. This prevents unauthorized removal or tipping.

Figure 2: The Marcree 8-10 Gun Safe can be discreetly placed and mounted in various home environments, such as a closet.
5. Features and Components Overview
Your Marcree B3-10D-5 Gun Safe offers a comprehensive solution for firearm storage with advanced security and flexible organization.
- Extra-Large Capacity: With dimensions of H51.97”×W17.71”×D14.96”, it can securely hold 8-10 rifles, 4 handguns, and a large amount of ammunition.
- Military-Grade Protection: Constructed from advanced alloy steel with 3 thickened solid locking bolts and an anti-pry design.
- Intelligent Alarm System: Triggers a 70dB alert after 3 incorrect password attempts.
- Digital Panel: Sensitive and responsive for quick unlocking.
- Silent Mode: Allows quiet operation in sensitive scenarios.
- High-Brightness LED Lighting: Ensures clear visibility inside the safe.
- Adjustable Interior: Includes 3 adjustable gun racks, removable partitions, pistol storage pouches, and ammo bags for personalized organization.

Figure 3: Interior features of the Marcree 8-10 Gun Safe.
6. Operating Instructions
6.1 First-Time Opening and Password Setting
Upon first use, open the safe using the emergency keys. Follow the instructions in the manual to set your personal 3-8 digit password on the digital panel. Ensure you test the new password with the door open before closing it.
Video 2: How to unlock a gun cabinet and how to set a password. This video demonstrates the process of initial unlocking and setting a new password.
6.2 Dual Alarm & Mute Mode
The safe is equipped with an intelligent alarm system. If the password is entered incorrectly 3 consecutive times, a loud 70-decibel alarm will be triggered for one minute. To activate silent mode, long-press the "1" key to toggle between silent and non-silent modes, allowing quiet access when needed.

Figure 4: Explanation of the dual alarm system and silent mode.
7. Storage Configuration
The interior of your safe is highly customizable to fit your storage needs. Utilize the 3 adjustable gun racks, removable partitions, pistol storage pouches, and ammo bags to create a personalized and organized space for your firearms and accessories.

Figure 5: Adjustable interior components for flexible storage.

Figure 6: Visual representation of the safe's capacity and dimensions.
8. Maintenance
Regular maintenance ensures the longevity and optimal performance of your safe.
- Cleaning: Wipe the exterior with a soft, damp cloth. Avoid abrasive cleaners.
- Battery Replacement: Replace the digital lock batteries periodically (typically every 6-12 months) or when the low battery indicator appears. Use the emergency battery cable if the batteries are completely drained.
- Lock Mechanism: Keep the lock mechanism free from dust and debris. Do not lubricate the digital keypad.
9. Troubleshooting
If you encounter issues with your safe, refer to the following common problems and solutions:
- Digital Lock Not Responding: Check battery levels. Replace batteries or use the emergency battery cable.
- Alarm Triggered Accidentally: Enter the correct password to disarm the alarm.
- Door Not Closing Properly: Ensure no items are obstructing the door or locking bolts. Check for any misalignment.
- Lost Password: Use the emergency keys to open the safe and reset the password according to the instructions.
10. Specifications
| Brand | Marcree |
| Model Name | B3-10D-5 |
| Product Dimensions | 14.96"D x 17.71"W x 51.96"H |
| Material | Alloy Steel |
| Lock Type | Electronic Combination Lock, Key |
| Special Feature | Alarm System |
| Mounting Type | Wall Mount, Freestanding |
| Number of Shelves | 3 (adjustable) |
11. Warranty and Support
Marcree is committed to providing excellent customer service. If you encounter any problems during installation or daily use of your gun safe, professional one-on-one online guidance and installation videos are available. Please feel free to contact us; we are available 24 hours a day to solve your problems, ensuring a worry-free experience with your new firearm storage solution.