Stern Defense SD-001 Mag-AD Flare Magazine Adapter - AR-15 9mm

The Stern Defense SD-001 Mag-AD Flare transforms standard AR-15 platforms into reliable 9mm carbines through precision-engineered magazine compatibility. This CNC-machined adapter eliminates the need for dedicated lower receivers while maintaining the familiar AR-15 manual of arms that shooters already know.

What Makes This Different

Unlike bulky conversion kits that require permanent modifications, the SD-001 installs without gunsmithing or irreversible changes to the host firearm. The adapter accepts standard Glock magazines while maintaining proper bolt hold-open function and consistent feeding geometry. Machined from 7075-T6 aluminum with Type III hard anodizing, it withstands thousands of rounds while weighing just 3.2 ounces.

Key Features

• Compatible with Glock 17, 19, and 33-round magazines
• CNC-machined 7075-T6 aluminum construction with hard anodizing
• Drop-in installation requires no permanent modifications
• Maintains proper bolt hold-open and last round functionality
• Integrated flare design prevents magazine over-insertion
• Weighs 3.2 ounces with minimal profile impact
• Compatible with mil-spec and commercial AR-15 lower receivers

The SD-001 delivers consistent cycling across various 9mm loads, from 115-grain practice ammunition to 147-grain subsonic rounds. Law enforcement agencies utilize these adapters for training cost reduction and parts commonality with existing Glock inventory. Competition shooters appreciate the faster magazine changes compared to dedicated PCC platforms, while the system handles suppressed fire without reliability issues.

Technical Specs

• Material: 7075-T6 aluminum with Type III hard anodizing
• Weight: 3.2 ounces
• Overall length: 4.8 inches
• Magazine compatibility: Glock 9mm (17, 19, 33-round)
• Lower receiver compatibility: Mil-spec and commercial AR-15
• Finish: Black hard anodized
• Country of origin: United States
• Warranty: Limited lifetime warranty

The SD-001 represents proven engineering for shooters who demand reliability without compromise. Professional users trust Stern Defense adapters for their consistent performance and American manufacturing quality. This adapter ships ready to install with detailed instructions for immediate deployment.