5.56 Assembled Upper 16'' M4 Bbl W/Moe Sl Carb Handguard Blk

The Aero Precision 5.56 assembled upper receiver gives you a complete, ready-to-run top end for your AR-15 build. This 16-inch M4 carbine upper comes fully assembled with a pinned front sight base, Magpul MOE SL carbine handguard, and all the essentials you need to pair with a compatible lower receiver. It's the kind of no-fuss upper that works for hunters, sport shooters, and builders who want quality components without the assembly work.

The 16-inch 5.56 NATO barrel features a carbine-length gas system and a standard A2 flash hider, a proven combination that balances handling, velocity, and reliability. The pinned front sight base gives you immediate aiming capability right out of the box—no tools needed to get rounds downrange. The Magpul MOE SL handguard offers a slim, lightweight profile that keeps your rifle nimble while providing comfortable purchase and real estate for accessories if you want them later.

This is a no-frills, honest upper built to Aero Precision's exacting standards. The flat-top receiver accepts any standard AR optic mounting system, so you can add a scope, red dot, or backup iron sights to suit your mission. Whether you're assembling your first AR or adding to an existing platform, this upper receiver delivers the kind of durability and fit that serious shooters rely on.

Key Features

• Complete assembled upper receiver—no gunsmithing required
• 16-inch 5.56 NATO carbine barrel with pinned front sight base
• Carbine-length gas system for reliable cycling and moderate impulse
• Magpul MOE SL carbine handguard in black for comfortable control and modularity
• Standard A2 flash hider to reduce muzzle signature
• Flat-top receiver for optic mounting flexibility

Specifications

Frequently Asked Questions

Does this upper include a charging handle and bolt carrier group?

No. This assembled upper comes without a charging handle or bolt carrier group. You'll need to source those separately to complete your build.

What lower receiver will this upper fit?

This upper receiver is designed for standard AR-15 pattern lower receivers. Verify compatibility with your specific lower before purchase.

Can I mount an optic to this upper?

Yes. The flat-top receiver is compatible with standard AR optic mounting systems, including Picatinny rail-mounted scopes, red dots, and other accessories.

What's included in the box?

The assembled upper receiver with barrel, pinned front sight base, Magpul MOE SL handguard, and A2 flash hider. Charging handle and bolt carrier group are not included.