SD Mod 5 9mm Upper Receiver 6in M-LOK Complete Black
$460.45 at OpticsPlanet · 3 stores
In stock Sale
SD Mod 5 9mm Upper Receiver 8.5In M-LOK Complete Black
Stern Defense · Upper Receiver
No ratings yetBest price
$486.45at Brownells
Out of stock checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $486.45checked Oct 1, 2026 | Out of stock | Buy at Brownells |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $486.45 | $486.45 | $486.45 |
Since Sep 27, 2026.
About this part
The SD Mod 5 9mm Upper Receiver 8.5In M-LOK Complete Black is an AR-9 complete upper receiver from Stern Defense. One store lists it, Brownells at $486.45.
Fits and works with
- Caliber
- 9mm · Shop matching ammo
- Bolt
- 9mm · Bolt carrier groups
- Barrel length
- 8.5" · Handguards
- Handguard length
- 8.5" · Barrels
Specifications
- Manufacturer
- Stern Defense
- Color
- Black
- Type
- Complete
- Platform
- AR-9
- Barrel length
- 8.5"
From the manufacturer
Complete Assembly with Blast Can
The Stern Defense SD Mod 5 9mm Upper Receivers are unique with handguards that extend beyond the end of the barrels. The 8.5” barreled upper has a 10” M-LOK free float handguard, and the 6” barreled upper has an 8” M-LOK free float handguard.
To bring the muzzle out beyond the end of the handguard both uppers have SD HBC 9MM Blast Can installed. Both barrels have a 1-10 rate of twist, ½-36 muzzle thread pitch, and a Melonite finish.
- 8.5” or 6” barrels
- M-LOK Free Float handguard
- Complete assembly with 9mm bolt and charging handle
- ½-36 muzzle thread pitch
- SD BU9 9mm Bolt
Included in the upper receiver is charging handle and the Stern Defense 9mm Bolt which is compatible with both Glock and Colt SMG magazines, has a Melonite finish, and is works in conjunction with the Law Tactical Folding Adapter. The Stern Defense SD Mod 5 9mm Upper Receiver is made in the U.S.A. All NFA rules apply.
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