Spike’s Tactical M4 Flat Top Upper Receiver

Description

Spike’s Tactical M4 Flat Top Upper Receiver

The Spike’s Tactical M4 Flat Top Upper Receiver is a mil-spec forged component designed to provide a strong, reliable foundation for AR-15 builds chambered in 5.56x45mm NATO. Precision machined from a 7075-T6 aluminum forging, this upper receiver delivers the durability and structural integrity required for consistent performance under demanding conditions. Whether you’re assembling a new rifle or upgrading an existing platform, this upper offers a proven starting point for a dependable build.

Built to true mil-spec standards, the Spike’s Tactical M4 Flat Top Upper Receiver features a flat top Picatinny rail with engraved T-markings for repeatable optic and accessory placement. These reference points allow shooters to maintain consistent positioning when mounting optics, backup sights, or other rail-mounted components. The flat top design provides maximum flexibility, making it compatible with a wide range of modern optics and sighting systems.

This upper receiver comes fully equipped with essential components pre-installed, including the forward assist and ejection port door assembly. The ejection port door, spring, and rod are already installed from the factory, along with the forward assist, saving time during assembly and ensuring proper fitment. This allows builders to focus on completing their upper without needing to source or install these small parts separately.

Finished with a Type III hardcoat anodized treatment, the Spike’s Tactical M4 Flat Top Upper Receiver offers excellent resistance to wear, corrosion, and environmental exposure. This finish not only enhances durability but also maintains a uniform, non-reflective appearance that matches standard AR components. The inclusion of the Spike’s Tactical logo adds a subtle branded touch.

Weighing approximately 8.5 ounces, this upper receiver maintains a balanced profile that supports both durability and manageable weight. Its compatibility with standard AR-15 components ensures seamless integration with barrels, bolt carrier groups, and handguards designed to mil-spec dimensions.

For builders seeking a reliable, properly machined upper receiver with key components already installed, the Spike’s Tactical M4 Flat Top Upper Receiver delivers a straightforward, performance-focused solution. Backed by quality materials and consistent manufacturing, it’s a solid choice for any AR-15 rifle build.