StopBox USA Chamber Lock Pro

$129.99

StopBox USA — Chamber Lock Pro

Keep your rifle or shotgun secure and ready. The Chamber Lock Pro is a patented, all-mechanical chamber blocking device engineered to prevent unintended access or discharge while preserving fast, instinctive access for the firearm owner. It’s built from aircraft-grade 6061-T6 aluminum with hard anodized finishes for durability and light weight, and it operates without batteries or electronics — a simple, rugged mechanical solution you can depend on.

What it does
The Chamber Lock Pro inserts directly into the chamber of compatible AR-15 uppers (and select 12-gauge pump shotguns with the shotgun variant) and physically prevents a round from seating or the firearm from firing while in place. It’s designed for rapid installation and removal by trained, authorized users while acting as a clear, robust physical barrier against unintentional access.

Key features

  • Patented, all-mechanical design — no batteries, no electronics to fail.

  • Precision-machined 6061-T6 aluminum construction with Type II/III hard anodize for corrosion and wear resistance.

  • Engineered for Mil-Spec AR-15 uppers (compatibility notes and exclusions listed by model).

  • Compact, low-profile form factor that stores in the chamber when not in use and installs quickly when needed.

Specifications

  • Material: 6061-T6 aluminum, hard anodized.

  • Intended platforms: Mil-Spec AR-15 uppers; shotgun model available for many pump 12-gauge shotguns.

  • Finish: Type II / Type III hard anodize.

The Chamber Lock Pro — precision-machined, battery-free chamber security that keeps your AR-15 or 12-gauge shotgun physically safe and instantly accessible to authorized users. Built in the USA for reliability and speed.

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StopBox USA — Chamber Lock Pro

Keep your rifle or shotgun secure and ready. The Chamber Lock Pro is a patented, all-mechanical chamber blocking device engineered to prevent unintended access or discharge while preserving fast, instinctive access for the firearm owner. It’s built from aircraft-grade 6061-T6 aluminum with hard anodized finishes for durability and light weight, and it operates without batteries or electronics — a simple, rugged mechanical solution you can depend on.

What it does
The Chamber Lock Pro inserts directly into the chamber of compatible AR-15 uppers (and select 12-gauge pump shotguns with the shotgun variant) and physically prevents a round from seating or the firearm from firing while in place. It’s designed for rapid installation and removal by trained, authorized users while acting as a clear, robust physical barrier against unintentional access.

Key features

  • Patented, all-mechanical design — no batteries, no electronics to fail.

  • Precision-machined 6061-T6 aluminum construction with Type II/III hard anodize for corrosion and wear resistance.

  • Engineered for Mil-Spec AR-15 uppers (compatibility notes and exclusions listed by model).

  • Compact, low-profile form factor that stores in the chamber when not in use and installs quickly when needed.

Specifications

  • Material: 6061-T6 aluminum, hard anodized.

  • Intended platforms: Mil-Spec AR-15 uppers; shotgun model available for many pump 12-gauge shotguns.

  • Finish: Type II / Type III hard anodize.

The Chamber Lock Pro — precision-machined, battery-free chamber security that keeps your AR-15 or 12-gauge shotgun physically safe and instantly accessible to authorized users. Built in the USA for reliability and speed.