Radian Weapons Model 1 Complete Upper Receiver .223 Wylde 17.5 in Barrel Custom Intermediate 1-8 Twist 1/2x28 Thread M-LOK Deadair Flash Hider FDE
$2,069.95 at OpticsPlanet · 2 stores
In stock Sale
Best price
$2,179.00at MidwayUSA
In stock checked Oct 22, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| MidwayUSA Best price | $2,179.00checked Oct 22, 2026 | In stock | Buy at MidwayUSA | |
| Ammunition Depot | $2,179.00checked Oct 11, 2026 | In stock | Buy at Ammunition Depot | |
| Palmetto State Armory | $2,179.99checked Oct 10, 2026 | Check store | Buy at Palmetto State Armory | |
| Kentucky Gun Co | $1,915.99checked Oct 22, 2026 | Out of stock | Buy at Kentucky Gun Co |
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: $1,997.86 at Kentucky Gun Co. Dashed line = out of stock. Tracking since Oct 7, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | — | $2,179.00 | $2,179.00 |
| Kentucky Gun Co | $1,915.99 | $1,915.99 | $1,997.86 |
| MidwayUSA | $2,179.00 | $2,179.00 | $2,179.00 |
| Palmetto State Armory | — | $2,179.99 | $2,179.99 |
Since Oct 7, 2026.
About this part
The HK MR556A4 11" 5.56mm Upper Kit is an 11" 5.56 / .223 upper receiver from H&K. It's sold by 4 stores (2 in stock), from $1,915.99 to $2,179.99. The lowest in-stock price in the last 30 days was $1,997.86 at Kentucky Gun Co.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Barrel length
- 11" · Handguards
Specifications
- Manufacturer
- H&K
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
HK MR556A4 11" 5.56mm Upper Kit
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