Rock River Arms Completed Upper Receiver FESP .223 Wylde 16 Inch Barrel Mid Lenght Profile 1-8 Twist 1/2-28 Thread Free-Float Handguard Brake Black
$713.92 at MidwayUSA · 2 stores
In stock Sale
Best price
$719.99at Brownells
In stock Sale checked Oct 21, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $719.99Salechecked Oct 21, 2026 | In 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: $719.99 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $719.99 | $719.99 | $719.99 |
Since Sep 27, 2026.
About this part
The Retro Brn-601 5.56mm 20" Bbl Upper Receiver is an AR-15 complete upper receiver from Brownells. One store lists it, Brownells at $719.99. The lowest in-stock price in the last 30 days was $719.99 at Brownells.
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
- 2E+1" · Handguards
Specifications
- Manufacturer
- Brownells
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Barrel length
- 20"
From the manufacturer
The BRN-601A(R) Complete Upper Receiver is back! Styled after the original Model 601, introduced in the late 1950s, the BRN-601A(R) has distinct features, only found on those early AR-15 rifles. Starting at the muzzle, the "duckbill" flash hider is retained by a proper split washer of the proper size. The flash hider is attached to a lightweight 20 inch barrel, found on AR-15 variants through the M16A1. The 1-12 twist stabilizes 55gr and lighter projectiles extremely well, while the 20 inch barrel provides plenty of velocity. The front sight base is not F-marked, meaning the round, tapered front sight post is properly in line with the carry handle rear sight. So Mfg: Brownells
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