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M4E1 & M5E1 Enhanced Series

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The Enhanced Series begins with our all new state-of-the-art forged upper receiver. The M4E1 (5.56) and M5E1 (.308) upper receivers are a one-piece design combining the rail’s mounting surface with the upper itself. This provides near monolithic strength with ease of installation and modularity.

The Enhanced Series begins with our all new state-of-the-art forged upper receiver. The M4E1 (5.56) and M5E1 (.308) upper receivers are a one-piece design combining the rail’s mounting surface with the upper itself. This provides near monolithic strength with ease of installation and modularity.

The Enhanced Series begins with our all new state-of-the-art forged upper receiver. The M4E1 (5.56) and M5E1 (.308) upper receivers are a one-piece design combining the rail’s mounting surface with the upper itself. This provides near monolithic strength with ease of installation and modularity.

The Enhanced Series begins with our all new state-of-the-art forged upper receiver. The M4E1 (5.56) and M5E1 (.308) upper receivers are a one-piece design combining the rail’s mounting surface with the upper itself. This provides near monolithic strength with ease of installation and modularity.