Heckler & Koch MR762 A4 7.62x51mm NATO 13inch Upper Receiver Medium Contour Short Length 1-10 Twist 5/8x24 Threads Break Black
$2,437.99 at Kentucky Gun Co · 3 stores
In stock
Best price
$2,179.00at MidwayUSA
In stock checked Oct 23, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| MidwayUSA Best price | $2,179.00checked Oct 23, 2026 | In stock | Buy at MidwayUSA | |
| Kentucky Gun Co | $1,915.99checked Oct 23, 2026 | Out of stock | Buy at Kentucky Gun Co | |
| OpticsPlanet | $2,179.00Salechecked Oct 23, 2026 | Out of stock | Buy at OpticsPlanet |
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: $2,179.00 at MidwayUSA. Dashed line = out of stock. Tracking since Oct 15, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Kentucky Gun Co | $1,915.99 | $1,915.99 | $1,915.99 |
| MidwayUSA | $2,179.00 | $2,179.00 | $2,179.00 |
| OpticsPlanet | $2,179.00 | $2,179.00 | $2,179.00 |
Since Oct 15, 2026.
About this part
The HK UPPER RECEIVER KIT MR556A4 16.5" is a 16.5" upper receiver from Heckler & Koch. It's sold by 3 stores (1 in stock), from $1,915.99 to $2,179.00. The lowest in-stock price in the last 30 days was $2,179.00 at MidwayUSA.
Fits and works with
- Barrel length
- 16.5" · Handguards
Specifications
- Manufacturer
- Heckler & Koch
From the manufacturer
HK UPPER RECEIVER KIT MR556A4 16.5''. 5" - Specifications for HK 51000384 UPPER RECEIVER KIT MR556A4 16.5": Manufacturer: Heckler & Koch Condition: New HK 51000384 UPPER RECEIVER KIT MR556A4 16.5"
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