StopBox - Chamber Lock

All-Mechanical. No Batteries. Always Ready.
Designed to prevent unintentional access while keeping your firearm at the ready. The patented mechanical hand-gesture code lock is intuitive, even in the dark or under stress.

Compatibility
AR-15 Chamber Lock: Compatible with Mil-spec AR-15 uppers.
⚠️ Not compatible with:
- Ruger AR-556
- Radian A-DAC Upper Receiver
- Juggernaut Tactical AR-15 Billet Upper
- May have issues with some PSA uppers

Shotgun Chamber Lock: Compatible with most pump 12-gauge shotguns, including Mossberg 590 and Remington 870.

Premium Materials
Machined from 6061 T6 aluminum and finished with Type II and Type III hard anodizing for superior strength and durability.

Combination Options
- Comes with 6 preset configurations
- Upgrade to 81 combinations with the Actuator Accessory Pack
- Note: We recommend keeping the preset combo unless you have specific physical needs. The lock is not intended to stop someone familiar with StopBox operation.

Made in the USA
Proudly engineered and manufactured in the United States.

Patented Design
U.S. Patent No. 11,435,154