Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 20 Inch Barrel Standart Profile 1-9 Twist 1/2-28 Thread A2 Handguard A2 Flash Hider
$417.33 at MidwayUSA · 2 stores
In stock Sale
Luth-AR Lightweight Complete Upper Barrel Receiver Assembly 5.56mm 26in 16in Light Weight Carbine 1x9 1/2x28 Picatinny Key MOD A2 Flash Hider Anodized
No ratings yetBest price
$413.99at GunMag Warehouse
In stock Lowest in 30 dayschecked Nov 13, 2026
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Gas system
- Carbine · Handguards
- Muzzle thread
- 1/2x28 · Muzzle devices
- Barrel length
- 26" · Handguards
Specifications
- Manufacturer
- Luth-AR
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Gas system
- Carbine
- Barrel length
- 16"
- Twist rate
- 1:9
- Length
- 15"
- Weight
- 128 oz
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| GunMag Warehouse Best price | $413.99checked Nov 13, 2026 | In stock | Buy at GunMag Warehouse | |
| Kentucky Gun Co | $415.74checked Nov 13, 2026 | In stock | Buy at Kentucky Gun Co | |
| OpticsPlanet | $419.99Salechecked Nov 13, 2026 | In stock | Buy at OpticsPlanet | |
| Palmetto State Armory | $413.99Salechecked Nov 13, 2026 | Check store | Buy at Palmetto State Armory |
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: $413.99 at GunMag Warehouse. Dashed line = out of stock. Tracking since Oct 15, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| GunMag Warehouse | $413.99 | $413.99 | $413.99 |
| Kentucky Gun Co | $415.74 | $413.55 | $415.74 |
| OpticsPlanet | $419.99 | $413.55 | $419.99 |
| Palmetto State Armory | $413.99 | $413.99 | $413.99 |
Since Oct 15, 2026.
About this part
The Luth-AR Lightweight Complete Upper Barrel Receiver Assembly 5.56mm 26in 16in Light Weight Carbine 1x9 1/2x28 Picatinny Key MOD A2 Flash Hider Anodized is an AR-15 complete upper receiver from Luth-AR. It's sold by 4 stores (3 in stock), from $413.99 to $419.99. The lowest in-stock price in the last 30 days was $413.99 at GunMag Warehouse.
From the manufacturer
Luth-AR Lightweight Complete Upper Barrel Receiver Assembly 5.56mm 26in 16in Light Weight Carbine 1x9 1/2x28 Picatinny Key MOD A2 Flash Hider Anodized. 56mm Lightweight barrel made from 4150 Chrome Molly with a 1-9 twist mated to Luth-AR A3 Flattop receiver which includes bolt carrier charging handle forward assist and ejection port cover. The upper is then topped off with Luth-AR Lo-profile gas system and ergonomic 15in Palm Handguard with KeyMod slots and a Picatinny top-rail. Specifications for Luth-AR 5.56mm Lightweight Complete Upper Barrel Receiver Assembly: Manufacturer: Luth-AR Caliber: 5.56x45mm NATO Overall Length: 26 in Barrel Length: 16 in Barrel Profile: Light Weight Gas System Length: Carbine Length Barrel Twist Rate: 1-9 Handguard Type: Free-Float Muzzle Device: A2 Flash Hider Finish: Manganese Phosphate Color: Black Gun Model: AR-15 Fabric/Material: 4150 Chrome Molly Vanadium 4140 Chrome Moly Gas Block Journal Size-Diameter: .750 in Handguard Length: 15 in Handguard Style: Round Rail Gun Rail: KeyMod Gun Make: AR Platform Weight: 8 lb Bolt Carrier Group Included: MIL-SPEC Charging Handle Included: MIL-SPEC Magazine Included: No Condition: New Threads per Inch: 1/2x28 Country of Origin: USA Features of Luth-AR AR-15 11.5in Lightweight Complete Upper Barrel Assembly Available in 11.5 inch 5.56 mm 4150 Chrome Moly Threaded Barrel - Thread Pitch 1/2 x 28 Gas Block Diameter .750 Gas Tube Length - Carbine 1-9 RH Barrel Twist 6 Lands and Groves M4 Feed Ramp Button Broached Package Contents: Luth-AR 5.56mm Lightweight Complete Upper Barrel Receiver Assembly What firearm models does the manufacturer say Luth-AR 5.56mm Lightweight Complete Upper Barrel Receiver Assembly is compatible with? The manufacturer says that Luth-AR 5.56mm Lightweight Complete Upper Barrel Receiver Assembly is compatible with AR-15Luth-AR BAA3-L16: Lightweight Complete Upper Barrel Receiver Assembly 5.56mm 26in 16in Light Weight Carbine 1x9 1/2x28 Picatinny M-LOK A2 Flash Hider Anodized Manganese Phosphate Black
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