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Luth-AR® 16" Lightweight Complete Upper Receiver Assembly – 5.56x45mm NATO / .223 Rem – 15" Palm Handguard KeyMod – Black – BAA3-L16
The Luth-AR® 16" Lightweight Complete AR-15 Upper Receiver Assembly (BAA3-L16) represents a masterfully engineered, high-efficiency tactical barrel grouping designed to maximize agility, ergonomic comfort, and mechanical accuracy for your modern carbine layout. While standard factory complete upper receivers frequently lean on heavy Government or M4-profile barrels paired with blocky, sharp-edged quad rails—frequently causing front-end weight imbalances, sluggish target transition speeds, and severe support-hand fatigue during intensive training courses—the Luth-AR platform overhauls standard design logic. This premium, range-ready barreled receiver package (812058030171) drops directly onto any standard Mil-Spec lower receiver, providing an exceptional, featherlight primary asset for competitive 3-Gun matches, varmint hunting loops, and defensive staging configurations.
The structural foundation of this high-performance upper assembly centers around a 16-inch lightweight contoured barrel forged from premium 4140 Chrome Moly steel. Engineered to shave off critical ounces forward of the receiver block, it balances weapon system dynamics while maintaining exceptional structural integrity across extensive firing schedules. The defining technical edge of the BAA3-L16 configuration is its precision-cut 5.56x45mm NATO chambering paired with a traditional 1:9" button rifling twist rate. This specialized layout delivers absolute stability and extreme accuracy metrics when tracking popular, affordable 55gr and 62gr ammunition loads. The muzzle is chopped to a standard 1/2"x28 TPI thread pitch, outfitted with a classic A2 birdcage flash hider to minimize optical glare and disrupt thermal signatures during low-light tactical sequences.
The true operational highlight of this complete upper assembly lies in its highly advanced handguard architecture and duty-grade bolt carrier group. Cloaking the gas system is a 15" Luth-AR Palm Handguard utilizing the modular KeyMod attachment interface. Featuring a unique triangular ergonomics layout with a flattened bottom profile, the handguard mimics the natural contours of the human palm, providing an incredibly secure, non-slip purchase when driving the muzzle between targets. The flat base also establishes an exceptionally stable, rock-solid surface when bracing the rifle over barricades or shooting rests. Completed by a factory-headspaced, fully assembled **Mil-Spec Bolt Carrier Group (BCG) and standard charging handle**, this 100% American-made upper assembly delivers total mechanical authority straight out of the box.
Includes: (1) Luth-AR 16" Lightweight Upper Receiver Assembly, 15" Palm Handguard KeyMod, Complete Mil-Spec Bolt Carrier Group, Standard Charging Handle, A2 Flash Hider, and Factory Protection Box.
*KeyMod Modular Accessory Mounting Guidance: Your Palm Handguard features full-length KeyMod slot channels along the sides and angled facets for direct attachment of modular gear. When mounting tactical flashlights, vertical grips, or bipod studs, always ensure the accessory's internal locking lugs are slipped completely forward into the narrow neck of the KeyMod slot before torquing the retention screws down tight. This locks the component securely against direct muzzle vibration and heavy counter-recoil impulses.
Key Features
- Featherlight 16" Contoured Barrel: 4140 Chrome Moly lightweight barrel profile shifts the rifle's center of gravity rearward, maximizing fast target-to-target tracking.
- Ergonomic 15" Palm Handguard: Unique triangular flat-bottom profile matches your hand's natural grasp while acting as a stable, anti-roll platform over field barricades.
- Versatile 1:9" Twist Rate: Precision rifling architecture provides optimal stabilization and exceptional downrange accuracy for ubiquitous 55-grain and 62-grain 5.56/.223 cartridges.
- True Drop-In Ready System: Ships completely assembled, headspaced, and equipped with a full bolt carrier group and charging handle to pin instantly onto any Mil-Spec AR-15 lower receiver.
- Modular KeyMod Interface: Lightweight handguard configuration minimizes unnecessary forward bulk while supplying ample real estate to secure tactical lights and laser systems.
- Heavy-Duty Hardcoat Anodizing: Upper receiver and handguard are treated with a matte Mil-A-8625 Type III Class 2 finish to ensure peerless protection against surface gouges and sweat corrosion.
Product Specifications
- Brand: Luth-AR® (Buffalo, MN)
- Product Line: Complete Drop-In Barreled Upper Receiver Series
- Model Name: 16" Lightweight Complete Upper with 15" KeyMod Palm Handguard
- SKU / MPN: BAA3-L16 (Alternative Part Numbers: BAA3L16 / LTH-BAA3-L16)
- Receiver Type: Mil-Spec Forged 7075-T6 Aluminum Flat-Top Upper
- Caliber Chambering: 5.56x45mm NATO / .223 Remington
- Barrel Length Spec: 16 Inches (406.40 mm)
- Barrel Material Core: 4140 Chrome Moly Steel
- Barrel Profile Contour: Lightweight / Slimline Match Class
- Rifling Twist Rate: 1:9" Button Rifled Right-Hand Twist
- Gas System Length: Carbine-Length Direct Impingement with Low-Profile Gas Block
- Muzzle Thread Pattern: 1/2"-28 TPI Right-Hand (A2 Flash Hider Installed)
- Handguard Profile: 15" Luth-AR Palm Handguard (Flat-Bottom Triangular Geometry)
- Accessory Attachment Interface: KeyMod System Array
- Bolt Carrier Group: Complete Mil-Spec M16-Profile BCG (Phosphate/Nitride Treated)
- Charging Handle: Standard Mil-Spec Aluminum Charging Handle
- Surface Finish Class: Matte Black Type III Hardcoat Anodized
- Product Net Assembly Weight: ~4.20 lbs (Ultra-Balanced Barreled Core)
- UPC Barcode: 812058030171
