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Radical Firearms Complete AR15 Upper Assembly - 223 Rem/556NATO - 16" Barrel - 1:7 Twist - Black - MLOK Handguard - A2 Flash Hider - RF00325 - 816903025633
Product Description
Building or upgrading an AR-15 carbine requires balancing barrel performance, handguard ergonomics, and modular mounting capability without overcomplicating the upper receiver group. The Radical Firearms Complete 16" 5.56 NATO Upper Assembly provides a turn-key solution engineered for general-purpose rifle staging. Built around a 16-inch 4150 Chrome Moly Vanadium steel barrel with a Melonite finish, this upper delivers corrosion resistance and long service life under high-volume firing schedules.
Featuring a 1:7 twist rate, the barrel reliably stabilizes a broad spectrum of 5.56 NATO and .223 Remington projectile weights, from standard 55-grain target loads up to heavy 77-grain match ammunition. The free-float M-LOK handguard extends down the length of the mid-length gas system, providing ample mounting real estate for weapon lights, foregrips, and optical sighting systems while isolating barrel whip for consistent shot-to-shot accuracy. A standard A2 flash hider comes pre-threaded onto the 1/2x28 muzzle to mitigate signature and muzzle climb.
Precision-machined from forged 7075-T6 aluminum with a MIL-SPEC Type III hardcoat anodized finish, the upper receiver features M4 feed ramps and standard Picatinny top rail alignment. Designed to mate seamlessly with any standard MIL-SPEC AR-15 lower receiver group, the RF00325 offers an accessible, rugged platform for duty, training, or defensive rifle builds.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Direct push-pin fitment onto all standard MIL-SPEC AR-15 lower receivers (5.56/.223 pattern). Accepts standard AR-15 Bolt Carrier Groups (BCG) and charging handles. Handguard accepts all M-LOK compatible accessories, rail sections, and low-profile gas block clearance setups.
Installation Sequence:
- Clear workspace and ensure lower receiver is fully unloaded with safety engaged.
- Install a quality M16 profile Bolt Carrier Group (BCG) and standard charging handle into the upper receiver channel.
- Align upper receiver front pivot lug and rear takedown lug with the corresponding pin holes on the lower receiver.
- Push front pivot pin and rear takedown pin fully into place to lock the assemblies together.
- Perform dry-fire function check and charge the action to verify smooth bolt travel and proper disconnector engagement.
Key Features
- 16-Inch 4150 CMV Barrel: Melonite-treated steel barrel balances heat dissipation, velocity, and longevity.
- 1:7 Twist Rate: Optimized to stabilize both common range ammunition and heavy match-grade projectiles.
- Free-Float M-LOK Handguard: Full-length M-LOK slots allow direct accessory mounting without rail flex interfering with barrel harmonics.
- 7075-T6 Forged Upper: Precision-machined aluminum upper receiver featuring M4 feed ramps and hardcoat anodizing.
- Standard 1/2x28 Threading: Pre-installed A2 flash suppressor easily removable for suppressor mounts or muzzle brakes.
Product Specifications
- Brand: Radical Firearms
- Model: Complete AR15 Upper Assembly
- MPN: RF00325
- UPC: 816903025633
- Caliber: 5.56x45mm NATO / .223 Remington
- Barrel Length: 16 Inches
- Twist Rate: 1:7"
- Barrel Material: 4150 Chrome Moly Vanadium Steel
- Barrel Finish: Melonite
- Gas System: Mid-Length
- Receiver Material: Forged 7075-T6 Aluminum
- Finish: Type III Hardcoat Anodized Black
- Handguard: Free-Float M-LOK
- Muzzle Device: A2 Flash Hider (1/2x28 Thread Pitch)
