Radical Firearms AR15 Stripped Upper Receiver Black RF00721 UPC 814033013898
Product Description
The Radical Firearms AR-15 Stripped Upper Receiver (RF00721) is a precision-forged, mil-spec upper receiver foundation engineered for custom AR-15 rifle and pistol builds. Precision CNC-machined from a heavy-duty 7075-T6 aluminum forging, this stripped upper receiver provides the structural rigidity and tight dimensional tolerances required for smooth bolt carrier cycling and reliable alignment across a wide range of calibers, including 5.56 NATO, .223 Remington, .300 AAC Blackout, and 6.5 Grendel.
Treated with a Type III hardcoat anodized matte black finish, the RF00721 housing resists scratching, environmental corrosion, chemical solvents, and severe firing heat. Built to standard mil-spec specifications, it includes standard mounting cuts for forward assists and ejection port dust cover assemblies, allowing armorers to complete the assembly with their preferred upper receiver hardware kits.
Featuring a full-length top MIL-STD-1913 Picatinny rail with laser-etched T-marks, the Radical Firearms stripped upper receiver ensures seamless rail alignment with free-float handguards and repeatable mounting for optics, magnifiers, and backup iron sights. Whether assembling a budget-friendly range setup, a tactical duty carbine, or a hard-use hunting rifle, the RF00721 delivers American-made quality at an unbeatable value.
Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits all standard mil-spec AR-15 lower receivers (5.56/.223/300BLK/6.5 Grendel). Accepts standard mil-spec ejection port door kits, forward assist assemblies, charging handles, and bolt carrier groups.
- Perform a complete workplace safety check and inspect the stripped upper receiver for any shipping debris or machining dust.
- Install the ejection port door assembly by inserting the hinge pin, C-clip, and door spring, verifying spring tension keeps the door closed until actuated.
- Install the forward assist assembly, securing the forward assist pawl pin using a dedicated roll pin punch.
- Apply a thin layer of aerosolized lithium grease or anti-seize compound to the barrel extension threads before sliding in your chosen barrel assembly.
- Torque your barrel nut to manufacturer specification (typically 35–80 ft-lbs), align the gas tube hole, and install the gas block/tube before handguard assembly.
Key Features
- Forged 7075-T6 Aluminum Construction: Delivers superior structural integrity and fatigue resistance under high pressures.
- Mil-Spec Type III Hardcoat Anodized Finish: Matte black protective coating shields against abrasion, corrosion, and harsh field conditions.
- Laser-Etched T-Marked Picatinny Rail: Top MIL-STD-1913 rail allows precise, repeatable optical mounting and indexing.
- Standard Mil-Spec Component Compatibility: Pre-drilled for standard forward assist and ejection port door assembly kits.
- Precision Machined Feed Ramp Cuts: Features standard M4 feed ramps for reliable feeding across diverse projectile profiles.
- Made in the USA: Precision-manufactured domestically in Texas for dependable quality control.
Product Specifications
- Brand: Radical Firearms
- Model/Series: AR-15 Stripped Upper Receiver
- MPN / SKU: RF00721
- UPC: 814033013898
- Platform Fitment: AR-15 / M4 / M16
- Caliber Compatibility: Multi-Caliber (5.56 NATO, .223 Rem, .300 BLK, 6.5 Grendel, etc.)
- Material: 7075-T6 Forged Aluminum
- Finish / Color: Type III Hardcoat Anodized Matte Black
- Feed Ramps: M4 Profile
- Weight: 6.9 oz
- Country of Origin: USA
