Radical Firearms RS11 5.56mm 11.5″ Black AR Pistol

Description

The Radical Firearms RS11 5.56mm 11.5″ Black is a purpose-built AR pistol designed for shooters who demand compact firepower without sacrificing reliability or accuracy. This modern platform combines tactical versatility with practical ergonomics, making it an excellent choice for home defense, close-quarters combat training, and specialized applications. With its 11.5-inch barrel and black furniture, the RS11 delivers the power of 5.56mm NATO in a highly maneuverable package. Radical Firearms has engineered this pistol to deliver consistent performance whether you’re a seasoned professional or an enthusiast looking to expand your collection.

Radical Firearms RS11 5.56mm 11.5″ — Key Specifications

• Caliber: 5.56mm NATO (.223 Remington)
• Barrel Length: 11.5 inches
• Overall Length: Approximately 18-20 inches with brace installed
• Finish: Black (hard anodized aluminum upper, phosphate-coated steel components)
• Action: Direct impingement semi-automatic
• Upper Receiver: Flat-top design with Picatinny rail for optics mounting
• Handguard: Free-floating M-LOK compatible for accessories
• Trigger: Standard mil-spec two-stage trigger
• Magazine Compatibility: Accepts standard AR-15 magazines (20, 30-round capacity)
• Safety Features: Manual thumb safety and bolt catch
• Sights: Picatinny rail ready (rear sight not included)
• Weight: Approximately 4.5-5.0 pounds unloaded

Performance & Reliability

The Radical Firearms RS11 5.56mm 11.5″ delivers exceptional accuracy and reliability in a compact platform. The short barrel maintains impressive velocity for 5.56mm ammunition while keeping the overall length manageable for confined spaces. Field testing shows consistent group sizes at defensive distances, and the direct impingement system cycles reliably with both standard and quality aftermarket ammunition. The free-floating barrel contributes to improved accuracy potential compared to traditional handguard designs.

Ergonomics are a strong suit of the RS11 platform. The pistol grip angle and controls align naturally with shooter instincts, reducing training time and improving presentation under stress. The modular design allows customization of handguards, grips, triggers, and optics through a robust aftermarket ecosystem. This adaptability means your RS11 can evolve with your needs, whether for defensive or training applications.

Durability testing confirms the Radical Firearms RS11 5.56mm 11.5″ withstands extended firing cycles and adverse conditions. The hard-anodized upper and phosphate-coated components resist corrosion and wear. Owners report thousands of rounds fired with minimal maintenance beyond standard AR-15 cleaning protocols. The proven design lineage means abundant information and support are available from the shooting community.

Intended Use & Applications

Home defense professionals and preppers favor the Radical Firearms RS11 5.56mm 11.5″ for its stopping power in a compact package. The short barrel excels in hallway engagement distances while remaining maneuverable through doorways and tight quarters. Law enforcement and military professionals recognize that short-barreled rifles provide tactical advantages in close-quarters battle scenarios. The lightweight design reduces fatigue during extended periods of readiness.

AR pistol enthusiasts and builders appreciate the quality foundation the RS11 provides for customization projects. Whether you’re developing a dedicated suppressed platform, a precision rifle project, or a tactical training tool, the Radical Firearms base design offers excellent versatility. Competition shooters use platforms like the RS11 for carbine matches, 3-gun events, and tactical courses requiring compact firearms. Visit our AR Pistols category to explore complete pistol builds and components.

The 11.5-inch configuration of the Radical Firearms RS11 5.56mm also appeals to those seeking the ultimate in portability for recreational shooting. Whether storing in a vehicle, carrying through wooded terrain, or keeping accessible for emergency response, this compact platform balances capability with practicality. Many shooters maintain an RS11 as a dedicated training tool, allowing them to develop skills with modern sporting rifle mechanics without the weight and bulk of a full-length rifle. Check our AR Rifles collection to compare additional configurations and builds.

Why Buy From CaliperDepot?

CaliperDepot maintains competitive pricing on quality firearms including the Radical Firearms RS11 5.56mm 11.5″ Black. Our warehouse stock ensures rapid processing and shipping, getting your firearm to your FFL dealer quickly and securely. We specialize in hard-to-find firearms and maintain relationships with leading manufacturers, meaning you access quality inventory when competitors are sold out. Our team understands the firearms market and actively seeks products that deliver real value to enthusiasts and professionals alike.

Customer service distinguishes CaliperDepot in the firearms retail space. Our support team answers technical questions about compatibility, customization, and specifications. We handle all FFL compliance requirements transparently and maintain clear communication throughout the purchase process. Whether this is your first AR pistol or your tenth, we’re committed to ensuring a smooth buying experience backed by industry knowledge and genuine customer care.

The Radical Firearms RS11 5.56mm 11.5″ Black represents excellent value in the compact modern sporting rifle market. Order your RS11 from CaliperDepot today and experience the reliability and performance this platform is known for. All transfers will be processed through your local licensed firearms dealer in accordance with federal and state regulations. Add the RS11 to your collection now and discover why shooters nationwide trust Radical Firearms engineering.