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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.
Shop All STERN Products47
Products
32
In Stock
-
Founded
USA
Origin
All STERN Products (32)
Stern Defense BU45 NiB Bolt Premium Finish Tactical
Stern Defense 001SDMAGADB929M AR-15 9mm Conversion Adapter Beretta 92
Stern Defense 001-SD MAG-ADD-FLARE Mag-AD Flare Adapter Matte Delrin
Stern Def. Pistol Upper 9MM 6" Bbl. 8" M-LOK Rail
Stern Defense 015SD10INCHMOD5MLOK855 9mm AR-15 Upper 8.5" Barrel Black
Stern Defense 015SD15INCHMOD4MLOK161 9mm 16.10" Black Melonite Barrel...
STERN 004SDBU9NIBECHOD2M 9mm Luger AR-15 Bolt Carrier NiB
Stern Defense 004SDBU9D1M 9mm Mag Phosphate 8620 Steel AR15/M16
Stern Defense 001SDMAGAD9GLOCK9AND40 Mag-AD9 9mm/40 S&W Adapter Black
Stern Defense 008-SD RAB-AD Mini Rapid Attach Buttstock Adapter Black
Stern Defense 008-SD RAB-AD Male Buttstock Adapter Black AR-15
Stern Defense 008SDRABADMINID1M Rapid Attach Mini Buttstock Adapter Black
STERN Rab-Ad Mini Rapid Attach Buttstock Adapter Picatinny Rail Mount
Stern Defense 008SDRABADD1M Rapid Attach Buttstock Adapter Black Aluminum
STERN 010UPPERRECIEVERKKP 7075-T6 Aluminum Anodized Type III
Stern Defense 015SD8INCHMOD5MLOK6INC 45ACP 6" Black Melonite Barrel Aluminum Anodized Receiver
Stern Defense 006-9MM 4" AR-15 Barrel 1/2x36 Melonite Matte Black
Stern Defense 006-9MM 16.1" 1/2-36 1:10 Melonite AR-15 Barrel Black
STERN Def. .45ACP 10.50In Barrel 1:16 Twist .578-28 Thread
STERN 00645ACPBARREL161INCHD .45 ACP 16.1 In Black Barrel
Stern Defense 006-9MM 10.5" 9mm AR-15 Barrel 1/2-36 1:10 Melonite
STERN H2S Drop-In Trigger Green 009H2SNIBD1M Fits
Stern Defense 009H2SD1M AR-15/AR-10 Drop-In Trigger 6061 Billet Aluminum
Stern 001SDMAGADMP9AND40/P32 AR-15 Magwell Adapter Black Aluminum
STERN 015SD4INCHMOD4MLOK4INC 9mm 4 In Chrome Moly AR-15 Upper
STERN MOD4 002SDHG8 8In 8Rd Aircraft Grade Aluminum Receiver
Stern Defense 002SDHG15 15" Aircraft Grade Aluminum Anodized Receiver...
STERN 015Sd15inchmod5mlok161 45 ACP 16.10 In Black Melonite
Stern Def. Bolt .45ACP Bu45 For Glock Cut UPPERS/M
Stern Defense 001SDMAGADMP45A AR-15 .45ACP Conversion Adapter
Stern Defense 004-SD 9mm Bolt Black Semi-Auto for AR-15 Glock/Colt
Stern Defense 001SDMAGADMP45ACPM Mag-AD 45 ACP Fits AR-15 Aluminum
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 August 2026
Trending right now based on the last 30 days of TheGunDock orders + page views.
Stern Def. Barrel .45ACP 10.5" .578-28" 1:16 MELON
$139.00
✓ In Stock · 1 sold this month
Stern Defense 001SDMAGADMP9AND40/P32 AR-15 Magwell Adapter B
$166.00
✓ In Stock · 1 sold this month
Stern Defense 001SDMAGADMP45ACPM Mag-AD 45 ACP Fits AR-15 Al
$166.00
✓ In Stock · 1 sold this month
Stern Defense 015SD15INCHMOD4MLOK161 9mm 16.10" Black Meloni
$507.00
✓ In Stock
Stern Defense 006-9MM 10.5" 9mm AR-15 Barrel 1/2-36 1:10 Mel
$119.00
✓ In Stock
Stern Def. Pistol Upper 9MM 6" Bbl. 8" M-LOK Rail
$438.00
✓ In Stock
Stern Defense 015SD4INCHMOD4MLOK4INC 9mm AR-15 Upper 4" Chro
$363.00
✓ In Stock
Stern Defense 010UPPERRECIEVERKKP Upper Receiver 7075-T6 Alu
$109.00
✓ In Stock
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STERN DEFENSE BU45 NIB ECHO BOLT
$137.00
✓ 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
$142.00
✓ 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
$49.00
✓ In Stock
Stern Defense 001SDMAGADB929M AR-15 9mm Conversion Adapter B
$192.00
✓ In Stock
Stern Defense 001SDMAGADMP45ACPM Mag-AD 45 ACP Fits AR-15 Al
$166.00
✓ 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
✓ In Stock
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A handful of negative posts about TheGunDock exist on Reddit and review sites. Here's an honest, point-by-point look at ...
Ready to Shop STERN?
Choose STERN when you need focused, 9mm-specific AR components that address feeding and conversion reliability....
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