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Questions & Answers
What lower is compatible with upper. I know there are different ones. Manufacturer Answer

If you are using our MAG-AD then any Mil Spec lower will work.

by STERN DEFENSE, Manufacturer, March 26, 2025
Can it use plus P ammo 147 grain Manufacturer Answer

Yes, please make sure you are using a heavy buffer. We typically recommend 5.4 ounces with 9mm but with plus P probably would be better to use 7.5 ounces.

by STERN DEFENSE, Manufacturer, March 26, 2025
Customer Reviews
Helpful Positive Review Awesome pistol upper by Kenny, Verified Owner, October 28, 2020
Quality build and flawless function. Handguard is just plain cool looking. Blast can is effective, much less noise then my other 9mm pistols (at least for the shooter) Accuracy seems ok but I have just been shooting standing unsuported. Paired wi...
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3/4 found this helpful
Helpful Positive Review Loads of fun! by dan, Verified Owner, September 11, 2022
Wow this thing is accurate! Hole on hole at 25 yards, and i can reach out to 100 no problem nailing 12x12 plates! I’m using a regular h2 buffer and a mean arms endo mag conversion and man is this a lot of fun! I’ve put 350 rounds through it and it ha...
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1/1 found this helpful
Helpful Positive Review Works good by Zoltan, Verified Owner, October 11, 2020
Works good, good finish with no sharp edges. The hexagonal blast can was oriented in a way that at the 6oclock forward most mlok slot the nut hit the muzzle device underneath the handguard, no issue as the blast can wasn't too tight like some ive rep...
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4/4 found this helpful
Most Recent Reviews Great Build by Beto, Verified Owner, January 6, 2025
It’s awesome, works flawless. Using it with a PSA px9 lower. Runned about 600 rounds with no issues.
Most Recent Reviews This is a must have for PCC conversion! by ThumperAEX, Verified Owner, April 15, 2024
I purchased the 8.5" upper and a Stern Glock mag adapter together. Check out my review of the adapter elsewhere. The two combined resulted in one the coolest, most fun shooting AR-style platform I've ever owned. The build of upper was tight. Ever...
Read More...
Read All 5 Reviews

This Labor Day Holiday Save 10% On All Stern Defense Products!

$47.64 Instant Savings Applied
Get a 10% savings instantly when purchasing this product before September 6th, 2025! Sales price already reflects these instant savings!
Caliber: 9mm Luger Barrel Length: 8.5 inMuzzle Device: SD HBC Blast Can Finish: Matte Color: Black Additional Features: 6061 aircraft grade aluminum. , Hard-coat anodized. , Light weight construction. , Smallest inside diameter 1.435 inches. , Sturdy Construction. Condition: New

Code: 3JS-URC-SD10M-015-SD10INCHMOD5-KK

MPN: 015-SD10INCHMOD5MLOK8.5INCHBARREL9MM-KK

UPC: 860141001560

$47.64 Instant Savings Applied
List: $486.45Save 12%
$428.81

Product Info for Stern Defense AR-15 10 inch Assembled Upper Receiver, 8.5 in 9mm Barrel w/MLOK Rail

Stern Defense 10 inch M-LOK rail(Barrel nut, bolts etc.)image

Stern Defense 8.5 inch 9mm barrel.

SD HBC 9MM Blast Can.

Stern Defense assembled upper receiver with dust cover and forward assist.

Stern Defense SD BU9 Glock cut bolt.

SD CH1 enhanced charging handle.

Will come assembled.

Information:

Handguard.

The free float M-LOK handguard from Stern Defense offers excellent ergonomics while remaining lightweight and strong. This handguard is M-LOK compatible to accept your favorite attachments. Features a secure clamp on mounting system that ensures that the handguard remains in place even under heavy abuse, sustained full auto fire, and shooting prone from a bi-pod. Machined from 6061 aircraft grade aluminum and hard-coat anodized for longevity and durability. These handguards also feature quick disconnect swivel holes.

Also Included, Barrel Nut and Bolts.

Technical Information:

6061 aircraft grade aluminum.

Hard-coat anodized.

Sturdy construction.

Light weight construction.

Length 10 inches.

Smallest inside diameter 1.435 inches.

made in specialized factories

Barrel.

Stern 9mm barrels are ideal for gun lovers who want to build their own custom dedicated 9mm AR15 upper group. Our barrels offer an advantage over the competition. Every stern defense barrel throat is machined deeper for a longer free bore to accommodate bullets with a longer ogive. We have found that some common defense rounds jam into the rifling before the round is fully chambered. Some of the barrels on the market do not accommodate this and will potentially result in nasty malfunctions, resulting in a round being stuck in the chamber requiring manual methods to clear the malfunction.

Note: Barrel comes with locating pin installed.

Information:

Barrel length is measured in overall length from breech to muzzle.

Caliber: 9mm.

Length: 8.5 Inches.

made in specialized factories

Threaded .5-36.

1:10 TWIST.

4150 Chrome-moly steel.

Melonite coating.

Receiver.

Mil-Spec flat top upper receiver with Stern Defense laser engraved dust cover and forward assist. Machined from 7075-t6 aluminum and hard-coat anodized. Mil-spec dry film lube in the bore.

Technical Information:

7075-t6 aluminum

Hard-coat anodized.

Sturdy construction.

made in specialized factories

Charging Handle.

Mil-spec charge handle for AR-15 rifles. Laser engraved with Stern Defense logo. Our latch is Ergonomically designed and provides a positive grip and easy one hand manipulations while charging your weapon under stressful situations. Made from 6061 aircraft grade aluminum billet and hardcoat anodized.

Technical Information:

Laser engraved.

6061 aircraft grade aluminum billet

Hard coat anodized.

Sturdy Construction.

made in specialized factories

Bolt.

Made with 8620 AISI steel and boasting a Melonite finish, the Stern bolt fits into Mil-Spec and Glock-pattern upper receivers. It functions with Colt SMG, Glock magazines and it's fully compatible with standard AR15/M16 charging handles. Comes fully assembled with all sub-components installed, including firing pin/spring/retaining pin, extractor, and extractor spring. Also included in bolt assembly is a propriety center and roll pins.

Technical Information:

made in specialized factories

Constructed from 8620 AISI steel.

Custom 4140 billet extractor providing superior ejection.

Glock cut.

Coating: Melonite

Weight: 15.5 OZ.

9MM

Blast Can.

This unique blast can was designed for those who need a device that directs muzzle gasses and blast away from the shooter but want a can that matches the look of an handguard better than a round can. Machined from 6061 aircraft grade aluminum billet and hardcoat anodized. 3.25 inches long and 1.3 inches across the widest point.

Note: Comes with crush washer.

Technical Information:

6061 aircraft grade aluminum.

Hard-coat anodized.

Sturdy construction.

Light weight construction.

made in specialized factories

9mm

Threaded .5-36

Specifications for Stern Defense AR-15 10 inch Assembled Upper Receiver, 8.5 in 9mm Barrel w/MLOK Rail:

Manufacturer: Stern Defense
Caliber: 9mm Luger
Barrel Length: 8.5 in
Muzzle Device: SD HBC Blast Can
Finish: Matte
Color: Black
Gun Model: AR-15
Additional Features: Hard-coat anodized., Smallest inside diameter 1.435 inches., Light weight construction., 6061 aircraft grade aluminum., Sturdy Construction.
Condition: New
Magazine Included: No
Length: 10 in

Package Contents:

  • Stern Defense AR-15 10 inch Assembled Upper Receiver, 8.5 in 9mm Barrel w/MLOK Rail

Stern Defense AR-15 10 inch Assembled Upper Receiver, 8.5 in 9mm Barrel w/MLOK Rail Orderable Models

List of Orderable Models

Stern Defense AR-15 10in Upper Receiver, 8.5in 9mm Barrel, MLOK Rail, SD BU9 Bolt, SD CH1 Charging Handle, SD HBC Blast Can, Black, 015-SD10INCHMOD5-KK , MPN: 015-SD10INCHMOD5MLOK8.5INCHBARREL9MM-KK , UPC: 860141001560 , Code: 3JS-URC-SD10M-015-SD10INCHMOD5-KK

Stern Defense AR-15 10 inch Assembled Upper Receiver, 8.5 in 9mm Barrel w/MLOK Rail Unavailable & Discontinued Models

List of Unorderable Models

DEMO, Stern Defense AR-15 10in Upper Receiver, 8.5in 9mm Barrel, MLOK Rail, SD BU9 Bolt, SD CH1 Charging Handle, SD HBC Blast Can, Black, 015-SD10INCHMOD5-KK , MPN: 015-SD10INCHMOD5MLOK8.5INCHBARREL9MM-KK- , Code: 3JS-URC-SD10M-015-SD10INCHMOD5-KK-DEMO
USED, Stern Defense AR-15 10in Upper Receiver, 8.5in 9mm Barrel, MLOK Rail, SD BU9 Bolt, SD CH1 Charging Handle, SD HBC Blast Can, Black, 015-SD10INCHMOD5-KK , MPN: 015-SD10INCHMOD5MLOK8.5INCHBARREL9MM-KK- , Code: 3JS-URC-SD10M-015-SD10INCHMOD5-KK-EDEMO-OT-U
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