StopBox® Shotgun Chamber Lock | Quick-Access 12 Gauge Shotgun Security
A home-defense shotgun should be ready when you need it and secured when you don’t.
The StopBox® Shotgun Chamber Lock provides a simple, mechanical way to secure your 12-gauge pump-action shotgun without sacrificing quick access. Designed for responsible firearm owners, this innovative chamber lock helps prevent unauthorized use while allowing rapid removal when seconds matter.
With no batteries, electronics, apps, or keys required, the StopBox Shotgun Chamber Lock delivers dependable security and fast access in one rugged, American-made design.
Built for Home Defense Shotguns
Unlike traditional locks that can be cumbersome to remove under stress, the StopBox Shotgun Chamber Lock is engineered specifically for defensive firearms.
Machined from durable 6061-T6 aluminum and finished with a hard-anodized coating, it is built to withstand years of use while maintaining smooth, reliable operation.
Designed for many popular 12-gauge pump-action shotguns, including models such as the Mossberg 590 and Remington 870, the lock installs directly into the chamber, rendering the firearm inoperable until removed.
Fast Mechanical Access
When it comes to defensive firearms, reliability matters.
The StopBox Shotgun Chamber Lock uses a patented mechanical access system with 81 possible finger-code combinations. There are no batteries to replace, no electronics to fail, and no keys to fumble with during an emergency.
Simply enter your personalized code and remove the lock quickly when access is needed.
Secure Without Sacrificing Readiness
Many firearm owners struggle to balance security and accessibility. The StopBox Shotgun Chamber Lock helps bridge that gap.
Whether your shotgun is stored beside the bed, mounted in a secure rack, staged in a safe room, or transported in a vehicle, the lock helps prevent unauthorized operation while remaining quickly accessible to the owner.
Why Choose the StopBox Shotgun Chamber Lock?
Built for 12-Gauge Pump Shotguns
Designed to work with many popular pump-action defensive shotguns.
No Batteries Required
Mechanical operation means no charging, no electronic failures, and no dead batteries.
Precision Aluminum Construction
Machined from durable 6061-T6 aluminum with a hard-anodized finish.
81 Customizable Access Codes
Create a personalized code that becomes second nature through practice.
Made in the USA
Proudly manufactured in Spokane, Washington using premium materials and proven craftsmanship.
Fast, Reliable Access
Designed to help responsible firearm owners maintain readiness without sacrificing security.
Security Designed for Responsible Gun Owners
The StopBox Shotgun Chamber Lock is ideal for homeowners who rely on a defensive shotgun but want an added layer of protection against unauthorized access.
Whether you’re protecting your family, securing a staged home-defense firearm, or adding another layer to your firearm safety plan, the StopBox Shotgun Chamber Lock provides a simple, dependable solution built around readiness and responsibility.
