Resolute Mk4 5.56 NATO Assembled Upper Rcvr 16.1" Bbl Black
$489.99 at OpticsPlanet · 5 stores
In stock Sale
Best price
$483.99at Brownells
Out of stock checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price | $483.99checked Oct 1, 2026 | Out of stock | Buy at Brownells | |
| OpticsPlanet | $519.99Salechecked Oct 1, 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
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $483.99 | $483.99 | $483.99 |
| OpticsPlanet | $519.99 | $519.99 | $519.99 |
Since Sep 28, 2026.
About this part
The Stag 15 M4 Phosphate Upper is a 5.56 / .223 upper receiver from Stag Arms. It's sold by 2 stores, from $483.99 to $519.99.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Specifications
- Manufacturer
- Stag Arms
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
No matter how many options emerge in the massive AR-15 market, there's always going to be a demand for that classic, M4-style configuration that's been proven on battlefields across the world. Now, you can have an AR-15 that's built to the same standards and with the same features as the M4 Carbine that's served with our military for decades. This is the Stag Arms Stag-15 M4 Upper Receiver. True to form, the Stag Arms Stag-15 M4 Upper Receiver is everything you're looking for in a GI-spec system, complete with the 5.56-NATO-Chambered barrel measuring 16-inch long and complete with a 1:7-inch twist rate. The barrel and chamber are chrome-lined for corrosion resista Mfg: Stag Arms
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