Radian Weapons Complete Upper, 300 Blackout, 9" Barrel, 1:5 Twist, Dead Air KeyMo Flash Hider, Pistol Length Gas, 8" MLOK Handguard, Radian Raptor-SD Charging Handle, Radian Enhanced Bolt Carrier Group, Cerakote Finish, Black, Fits AR-15 R0027

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 Lower receiver: Fits standard AR-15 lowers (mil-spec). Buffer system: Start with a carbine buffer; tune if needed for your ammo/suppressor combo. Optics: LPVOs (1-6×/1-8×), prisms, or red dot + magnifier pair well with 300 BLK ballistics. Muzzle devices: Already KeyMo-ready; add compatible Dead Air suppressors without extra adapters. 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