Mk109 Mod 2-M 300 AAC Blackout 9.75" Bbl Complete Upper
$1,399.95 at MidwayUSA · 5 stores
In stock
Ddm4 300 S 10.3" 300 AAC Blackout 1-8 9" Ddm4 Rail Upper
Daniel Defense · Upper Receiver
No ratings yetBest price
$1,462.00at OpticsPlanet
In stock Sale checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet Best price | $1,462.00Salechecked Oct 1, 2026 | In stock | Buy at OpticsPlanet | |
| MidwayUSA | $1,462.00checked Oct 1, 2026 | In stock | Buy at MidwayUSA | |
| Battlehawk Armory | $1,249.90Salechecked Oct 1, 2026 | Check store | Buy at Battlehawk Armory | |
| Brownells | $1,462.00checked 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
Lowest in-stock price in the last 30 days: $1,462.00 at MidwayUSA. Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Battlehawk Armory | $1,249.90 | $1,249.90 | $1,249.90 |
| Brownells | $1,462.00 | $1,462.00 | $1,462.00 |
| MidwayUSA | $1,462.00 | $1,462.00 | $1,462.00 |
| OpticsPlanet | $1,462.00 | $1,462.00 | $1,462.00 |
Since Sep 28, 2026.
About this part
The Ddm4 300 S 10.3" 300 AAC Blackout 1-8 9" Ddm4 Rail Upper is a 10.3" 300 Blackout upper receiver from Daniel Defense. It's sold by 4 stores (2 in stock), from $1,249.90 to $1,462.00. The lowest in-stock price in the last 30 days was $1,462.00 at MidwayUSA.
Fits and works with
- Caliber
- 300 Blackout · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Barrel length
- 10.3" · Handguards
- Handguard length
- 9" · Barrels
Specifications
- Manufacturer
- Daniel Defense
- Color
- Black
- Platform
- AR-15
- Caliber
- 300 Blackout
From the manufacturer
The Daniel Defense DDM4 300S was designed for operators demanding a short-barrel rifle chambered in the popular 300 Blackout cartridge. Using standard 5.56mm magazines and bolts, the 300S is able to deliver .30 caliber ammunition with greater muzzle energy than comparable 5.56mm rifles. The Daniel Defense DDM4 300S also features a durable hard coat anodized finish and a hammer forged 10.3" chrome moly barrel with a 1-8 twist in a Strength-to-Weight (S2W) profile. Threaded Muzzle: 5/8 x 24 TPI Pinned low profile gas block machined from 4140 hardened steel, pistol length Daniel Defense 17-4 PH stainless steel extended flash suppressor Chrome lined M16 pro Mfg: Daniel Defense
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