Radical Firearms 5.56 NATO 7.5" Upper Receiver Assembly Black RF00288 (UPC 816903023837)

The Radical Firearms 5.56 NATO 7.5" Upper Receiver Assembly Black RF00288 (UPC 816903023837) is a compact and powerful upper receiver designed for builders looking to create a short-barreled AR-15 pistol or SBR. Manufactured by Radical Firearms, this complete upper features a 7.5-inch barrel chambered in 5.56 NATO and comes finished in a durable black coating. The RF00288 offers an excellent balance of compact size, maneuverability, and reliable performance, making it a popular choice for close-quarters applications, home defense builds, and custom pistol configurations.

Radical Firearms has built a strong reputation for producing high-quality, affordable AR-15 components that deliver consistent performance. This 7.5" upper receiver assembly provides builders with a ready-to-install solution that pairs perfectly with a wide range of standard AR-15 lower receivers.

Compact 7.5-Inch Barrel Design

The 7.5-inch barrel on the Radical Firearms RF00288 is ideal for creating highly maneuverable firearms. This short barrel length significantly reduces the overall length of the rifle or pistol, making it easier to handle in tight spaces such as vehicles, home interiors, or during dynamic shooting scenarios. Despite its compact size, the 7.5" barrel still delivers effective terminal performance with 5.56 NATO ammunition, especially when paired with quality defensive or training loads.

Complete Upper Receiver Assembly

This Radical Firearms upper comes as a complete assembly, including the barrel, bolt carrier group, charging handle, and handguard. This ready-to-install design saves builders time and ensures proper component compatibility. The upper receiver is machined to tight tolerances and pairs seamlessly with standard mil-spec AR-15 lower receivers, giving builders the flexibility to create a custom firearm that meets their specific needs and preferences.

Versatile Platform for Custom Builds

The RF00288 is an excellent foundation for a variety of custom AR-15 pistol and short-barreled rifle builds. Its compact size makes it particularly well-suited for home defense setups where maneuverability is critical. Many builders choose this upper for truck guns, backpack rifles, or dedicated close-range training platforms. The black finish provides a professional appearance and helps protect the components from corrosion and wear during regular use.

Ideal Applications

• AR-15 pistol builds
• Short-barreled rifle (SBR) configurations
• Home defense and personal protection
• Close-quarters battle (CQB) training
• Vehicle defense setups
• Custom AR-15 builds requiring a compact upper

Why Choose the Radical Firearms RF00288 Upper?

• Compact 7.5-inch barrel for maximum maneuverability
• Complete upper receiver assembly for easy installation
• Chambered in versatile 5.56 NATO
• Durable black finish for long-term protection
• Compatible with standard AR-15 lower receivers
• Backed by Radical Firearms’ reputation for value and performance
• Ideal for builders seeking a short, powerful upper

The Radical Firearms 5.56 NATO 7.5" Upper Receiver Assembly Black RF00288 (UPC 816903023837) is a compact and capable upper receiver designed for builders who want a short-barreled AR-15 platform. Featuring a 7.5-inch barrel chambered in 5.56 NATO and finished in durable black, this complete upper offers excellent maneuverability without sacrificing performance. The RF00288 is an ideal choice for creating AR-15 pistols or short-barreled rifles where a compact overall length is desired. Radical Firearms has earned a reputation for producing reliable and affordable AR components, and this upper continues that tradition with its solid construction and practical design. The 7.5-inch barrel provides a significant reduction in overall length compared to standard carbine or rifle-length uppers, making it easier to handle in confined spaces. Whether you’re building a dedicated home defense pistol, a compact training rifle, or a custom SBR, the Radical Firearms RF00288 delivers the performance and value that serious builders expect. Its complete assembly includes all the necessary components for quick installation onto a compatible lower receiver. For those looking to create a highly maneuverable 5.56 NATO firearm with a short barrel, the Radical Firearms 7.5" Upper Receiver Assembly offers a strong foundation for a reliable and effective custom build.

Build your compact AR-15 with the Radical Firearms 5.56 NATO 7.5" Upper Receiver RF00288.