Radian Weapons Complete Upper – 300 Blackout – 9" Barrel, 1:5 Twist – Dead Air KeyMo Flash Hider – Pistol-Length Gas – 8" M-LOK® Handguard – Radian Raptor-SD™ Charging Handle – Radian Enhanced BCG – Cerakote® Black – Fits AR-15 (R0027) – UPC 817093020859

Compact power, premium parts, zero compromises. The Radian Weapons Complete Upper (R0027) in .300 AAC Blackout is engineered for shooters who demand best-in-class reliability and modern ergonomics in a short package. A 9" barrel with a 1:5 twist stabilizes heavy subsonic bullets as well as common supers, while a pistol-length gas system keeps cycling smooth—especially when suppressed. Up front, a Dead Air KeyMo® flash hider provides immediate flash reduction and serves as a ready host for KeyMo-compatible suppressors. The lightweight 8" M-LOK® handguard gives you rigid accessory mounting without bulk, and the package is topped off with the Radian Raptor-SD™ charging handle (ported to vent gas during suppressed fire) and the Radian Enhanced Bolt Carrier Group for rock-solid reliability. Finished in Cerakote® Black, this upper mounts to any mil-spec AR-15 lower.

Why this build? It’s a purpose-driven 300 BLK upper: fast 1:5 twist for subs, pistol gas for reliability, KeyMo for plug-and-play suppression, and Raptor-SD to tame blowback. Everything you want—nothing you don’t.

Key Benefits

• Suppressor-ready from day one: Dead Air KeyMo® flash hider doubles as your mount interface; add a KeyMo can and shoot.

• Subsonic & supersonic capable: The 1:5 twist is optimized to stabilize heavy 200–230+ gr subsonics while still running common 110–150 gr supers.

• Smooth, reliable cycling: Pistol-length gas balances pressure for dependable operation across ammo types, suppressed or unsuppressed.

• Cleaner, more comfortable shooting: Raptor-SD™ charging handle uses porting to redirect gas and reduce blowback to the face when suppressed.

• Duty-grade internals: Radian Enhanced BCG provides robust extraction, smooth carrier motion, and long service life.

• Rigid, lightweight control: 8" free-float M-LOK® handguard maintains barrel harmonics and gives you rock-solid mounting for lights, grips, and QD sling points.

• Durable finish: Cerakote® Black resists abrasion, weather, and solvents for a professional, low-glare appearance.

Feature Highlights

• Caliber: .300 AAC Blackout (300 BLK)

• Barrel: 9"; precision steel; 1:5 twist for heavy subs; threaded muzzle with Dead Air KeyMo® flash hider

• Gas System: Pistol-length for optimal pressure and dwell on short barrels

• Handguard: 8" free-float M-LOK® aluminum handguard; low-profile gas block under the rail

• Charging Handle: Radian Raptor-SD™ (ambi, ported)

• Bolt Carrier Group: Radian Enhanced BCG (complete)

• Finish: Cerakote® Black

• Receiver Pattern: AR-15 (standard mil-spec interface)

• SKU: R0027

• UPC: 817093020859

Exact small parts, gas block style, and muzzle thread pitch correspond to Radian’s 300 BLK spec for this SKU.

What You’ll Notice on the Range

• Quiet, controllable subsonic performance: Pair with a suppressor for soft recoil and minimized signature.

• Fast transitions, minimal POI shift: The free-float rail and quality barrel keep shots predictable from 25 to 200 yards.

• Better ergonomics under a can: Raptor-SD™ mitigates gas to the face; KeyMo provides repeatable lock-up and quick on/off.

Ideal Use Cases

• Suppressed home defense & patrol carbines where compact handling and low signature are priorities.

• Hog/varmint night setups using heavy subs, thermal/IR, and weapon lights on the M-LOK® rail.

• Training & range work for shooters who want a premium 300 BLK upper that just runs.

Setup & Compatibility Tips

1. Lower receiver: Fits standard AR-15 lowers (mil-spec).

2. Buffer system: Start with a carbine buffer; tune if needed for your ammo/suppressor combo.

3. Optics: LPVOs (1-6×/1-8×), prisms, or red dot + magnifier pair well with 300 BLK ballistics.

4. Muzzle devices: Already KeyMo-ready; add compatible Dead Air suppressors without extra adapters.

5. Zeroing: Many users choose a 50-yard zero for supers; confirm holds for your chosen subsonic load.

Legal & Safety Notes

• NFA compliance: A 9" barrel installed on a standard rifle lower constitutes an SBR. Use a pistol lower or a registered SBR lower, and comply with all federal, state, and local laws.

• Ammo selection: Only use .300 BLK ammo—never chamber 5.56/.223. Verify headstamp before loading.

• Suppressor use: Follow manufacturer torque and thread-locker guidance; confirm bore alignment before firing.

Maintenance & Care

• Gas & BCG: Clean and lube per normal AR practice; carbon will increase with subsonic/suppressed use—schedule cleanings accordingly.

• Handguard/rail: Re-torque fasteners after initial heat cycles; verify M-LOK® accessories are secured to spec.

• Muzzle device: Check KeyMo mount for carbon buildup; keep threads lightly anti-seized where recommended.

Specifications (At-a-Glance)

• Platform: AR-15 complete upper

• Caliber: 300 BLK

• Barrel: 9", 1:5 twist, threaded, Dead Air KeyMo flash hider

• Gas System: Pistol length

• Handguard: 8" free-float M-LOK®

• Charging Handle: Radian Raptor-SD™ (ambi, ported)

• BCG: Radian Enhanced Bolt Carrier Group

• Finish: Cerakote® Black

• SKU/UPC: R0027 / 817093020859

SEO Highlights (Quick Scan)

• Radian Weapons 300 Blackout complete upper

• 9" barrel, 1:5 twist, pistol-length gas for reliable suppressed/unsuppressed use

• Dead Air KeyMo flash hider, Raptor-SD charging handle, Radian Enhanced BCG

• 8" M-LOK handguard, Cerakote Black, fits AR-15

• SKU R0027, UPC 817093020859

Suggested Meta Title

Radian Weapons 300 BLK Complete Upper – 9" Barrel, 1:5 Twist, KeyMo, Raptor-SD, Enhanced BCG | R0027 | Cerakote Black

Suggested Meta Description

Build a premium suppressed 300 BLK with the Radian Weapons Complete Upper: 9" barrel (1:5), pistol gas, Dead Air KeyMo flash hider, 8" M-LOK handguard, Raptor-SD charging handle, and Enhanced BCG. Cerakote Black. Fits AR-15. R0027 / 817093020859.

The End