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Upgrade the performance of your AR15 build
This Aero Precision AR-15 M4E1 Upper Receiver Assembly features Enhanced Handguards that provide a lightweight free float design for your custom AR15 build. The EQ handguard system includes M-Lok slots for advanced modularity and customization. Machined to mil-spec dimensions and engineered for perfection, these handguards eliminate bulk while retaining strength and stability. All other components are standard to the AR15 platform.
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Right to Bear
They stand with you — no matter how tough the case
No recoupment clause means they don't come back for their money if things get complicated.
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Sign In to Set AlertThis is a bundled product that includes multiple components. The exact contents may vary - check the product description for more details.
• Complete assembly ready to use
• Multiple components included
• Value package pricing
Guide
A comprehensive overview of every major component in an AR-15 build—including what's inside bolt carrier groups and parts kits—organized by assembly for new builders.
12 min read
Guide
A neutral guide to component strategies for left-handed shooters, left-eye dominant right-handed shooters, and those managing eye/hand dominance mismatches. Covers ambi uppers, charging handles, gas system tuning, and real-world tradeoffs.
6 min read