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"Purpose-built 9mm AR solutions"
STERN specializes in 9mm AR parts and magazine adapters, focused on durable components that help convert and optimize AR platforms for pistol calibers.
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Products
29
In Stock
-
Founded
USA
Origin
All STERN Products (29)
Stern Defense 006-9MM 16.1" 1/2-36 1:10 Melonite AR-15 Barrel Black
STERN 00645ACPBARREL161INCHD .45 ACP 16.1 In Black Barrel
About STERN
STERN designs and manufactures components that support 9mm AR conversions and enhanced magazine compatibility. Their product range includes magazine adapter plates, dedicated 9mm bolts and carriers, and short-barrel 9mm uppers aimed at reliability and easy installation. Products are engineered for use in AR-style platforms and emphasize material selection and finishes suited to high-cycle, blowback, or direct-impingement 9mm systems. STERN items often serve builders and shooters who want purpose-built parts that simplify caliber conversion and feeding issues.
Headquarters
Established
-
Country of Origin
USA
History & Heritage
Specific founding details for STERN are not available. The brand has become known within the AR conversion space by offering specialized 9mm-focused parts and adapters used by builders and conversion kits.
Notable Products
Mag-AD magazine adapters, 9mm AR bolt carrier groups, 9mm AR uppers and short-barrel assemblies.
Why Choose STERN?
Choose STERN when you need focused, 9mm-specific AR components that address feeding and conversion reliability.
Hot STERN Items September 2026
Trending right now based on the last 30 days of TheGunDock orders + page views.
Stern Defense 004-SD 9mm Bolt Black Semi-Auto for AR-15 Gloc
$133.00
✓ In Stock
Stern Defense 004-9MMBOLTREPLACEMENTKIT 9mm Bolt Replacement
$36.00
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Stern Defense 015SD4INCHMOD4MLOK4INC 9mm AR-15 Upper 4" Chro
$390.00
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Stern Defense 00645ACPBARREL161INCHD .45 ACP 16.1" Black Bar
$148.00
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Stern Defense 008SDRABADMINID1M Rapid Attach Mini Buttstock
$123.00
✓ In Stock
Stern Defense 015SD10INCHMOD5MLOK855 9mm AR-15 Upper 8.5" Ba
$453.00
✓ In Stock
Stern Defense 006-9MM 16.1" 1/2-36 1:10 Melonite AR-15 Barre
$110.00
✓ In Stock
Stern Defense 001SDMAGADB929M AR-15 9mm Conversion Adapter B
$192.00
✓ In Stock
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STERN DEFENSE BU45 NIB ECHO BOLT
$130.00
✓ In Stock
Stern Defense 001SDMAGAD9GLOCK9AND40 Mag-AD9 9mm/40 S&W Adap
$164.00
✓ In Stock
Stern Defense 004SDBU9D1M 9mm Mag Phosphate 8620 Steel AR15/
$121.00
✓ In Stock
Stern Defense 004SDBU9NIBECHOD2M 9mm AR-15 Bolt Carrier Grou
$159.00
✓ In Stock
Stern Defense 015SD15INCHMOD4MLOK161 9mm 16.10" Black Meloni
$507.00
✓ In Stock
Stern Defense 015SD10INCHMOD5MLOK855 9mm AR-15 Upper 8.5" Ba
$453.00
✓ In Stock
Stern Def. Pistol Upper 9MM 6" Bbl. 8" M-LOK Rail
$438.00
✓ In Stock
Stern 001-SD MAG-ADD-FLARE Matte Delrin Mag-AD Flare Adapter
$68.00
✓ In Stock
Stern Defense 001SDMAGADB929M AR-15 9mm Conversion Adapter B
$192.00
✓ In Stock
Stern Defense 004-SD 9mm Bolt Black Semi-Auto for AR-15 Gloc
$133.00
✓ In Stock
Stern Defense 001SDMAGADMP45A AR-15 .45ACP Conversion Adapte
$192.00
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Stern Def. Bolt .45ACP Bu45 For Glock Cut UPPERS/M
$141.00
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