Luth-AR 11.5 in Light Weight Complete Upper Barrel Receiver Assembly - 5.56 1x7 twist M-LOK Free Float Handguard Black 11.5
$408.89 at OpticsPlanet · 2 stores
In stock Sale
Luth-AR Mark 12 Complete Upper Barrel Receiver Assembly 5.56 mm 27in 18in Government Rifle 1x9 1/2x28 PicatinnyKey MOD A2 Flash Hider Anodized
No ratings yetBest price
$432.35at OpticsPlanet
Out of stock Sale checked Oct 22, 2026
In stock now instead
- Luth-AR 11.5 in Light Weight Complete Upper Barrel Receiver Ass… $408.89at OpticsPlanet
- Luth-AR 16 in Light Weight Complete Upper Barrel Receiver Assem… $394.75at OpticsPlanet
- Rock River Arms Completed Upper Receiver Left Handed RAGE .223/… $439.99at OpticsPlanet
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet | $432.35Salechecked Oct 22, 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.
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This part is out of stock at every store we track. These similar upper receivers are in stock, with today's prices.
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Price history
Dashed line = out of stock. Tracking since Oct 15, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| OpticsPlanet | $432.35 | $432.35 | $432.35 |
Since Oct 15, 2026.
About this part
The Luth-AR Mark 12 Complete Upper Barrel Receiver Assembly 5.56 mm 27in 18in Government Rifle 1x9 1/2x28 PicatinnyKey MOD A2 Flash Hider Anodized is an AR-15 complete upper receiver from Luth-AR. One store lists it, OpticsPlanet at $432.35.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Muzzle thread
- 1/2x28 · Muzzle devices
- Barrel length
- 27" · Handguards
Specifications
- Manufacturer
- Luth-AR
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
Luth-AR Mark 12 Complete Upper Barrel Receiver Assembly 5.56 mm 27in 18in Government Rifle 1x9 1/2x28 PicatinnyKey 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 5.56 Mark 12 Complete Upper Barrel Receiver Assembly: Manufacturer: Luth-AR Caliber: 5.56x45mm NATO Overall Length: 27 in Barrel Length: 18 in Barrel Profile: Government Gas System Length: Rifle Length Barrel Twist Rate: 1-9 Firearms Threads Per Inch: 1/2x28 Handguard Type: Free-Float Muzzle Device: A2 Flash Hider Finish: Anodized Color: Black Gun Model: AR-15 Fabric/Material: 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 Barrel Material: 416R Stainless Steel Weight: 8 lb Bolt Carrier Group Included: MIL-SPEC Charging Handle Included: MIL-SPEC Magazine Included: No Country of Origin: USA Features of Luth-AR AR-15 MARK12 Complete Upper Barrel Receiver Assembly 18 inch Mark12 Barrel 5.56 mm 4140 Chrome Moly Threaded Barrel - Thread Pitch 1/2 x 28 1-9 RH Barrel Twist 6 Lands and Groves M4 Feed Ramp Button Broached Package Contents: Luth-AR 5.56 Mark 12 Complete Upper Barrel Receiver Assembly What firearm models does the manufacturer say Luth-AR 5.56 Mark 12 Complete Upper Barrel Receiver Assembly is compatible with? The manufacturer suggests that Luth-AR 5.56 Mark 12 Complete Upper Barrel Receiver Assembly is compatible with AR-15Luth-AR BAA3-M12: Mark 12 Complete Upper Barrel Receiver Assembly 5.56 mm 27in 18in Government Rifle 1x9 1/2x28 Picatinny M-LOK A2 Flash Hider Anodized Manganese Phosphate Black
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