AM Upper AR-15 .223 Remington 16" Barrel with Front Sight Base

The Anderson Manufacturing AR-15 upper with 16" .223 Remington barrel and front sight base gives you a field-ready, no-nonsense upper assembly for mid-range shooting, hunting, or general purpose rifle building. This is a complete upper—not just a barrel—built around a 7075 T6 forged receiver, so you're getting a structurally sound platform that handles both 5.56 NATO and .223 Remington ammunition. The 1-8 twist rate stabilizes a wide range of bullet weights, making it flexible for different shooting scenarios without forcing you to pick a narrow specialty load.

The 16" M4 profile barrel pairs with an integral front sight base, so you've got your front sight post anchored directly to the barrel—a straightforward, reliable setup that works whether you run iron sights only or plan to add optics. The carbine-length gas tube keeps the ergonomics compact and handy, and the included A2 flash hider tames muzzle signature and flash. You get an A2 handguard, charging handle, and complete M16 bolt carrier group, meaning this upper is assembled and ready to drop onto a lower receiver.

Parkerized finish handles field wear without fussing, and the Picatinny rail gives you mounting flexibility if you want to add accessories down the line. Whether you're building a reliable trainer, a truck gun, or a practical hunting rifle, an Anderson upper in .223/5.56 is a solid, straightforward choice that won't break the budget while delivering honest performance.

Key Features

• Complete upper assembly—7075 T6 forged receiver, barrel, bolt carrier group, and charging handle all included
• 16" M4 barrel with 1-8 twist rate, chambered for .223 Remington and 5.56 NATO
• Integrated front sight base on barrel for immediate iron sight use
• Carbine-length gas tube for compact, responsive handling
• A2 flash hider to reduce muzzle flash and signature
• Picatinny rail for accessory mounting
• Parkerized finish for durability and low-maintenance field use

Specifications

Frequently Asked Questions

Can I use this upper with .223 and 5.56 ammunition interchangeably?

Yes. The upper is chambered for both .223 Remington and 5.56 NATO, so either round will function reliably in this barrel.

What lower receiver does this upper require?

This upper assembly is designed to work with any standard AR-15 lower receiver. The upper attaches via the standard pivot and takedown pins found on all AR-15 platform lowers.

Does this come with everything I need to shoot?

This is a complete upper assembly with barrel, receiver, bolt carrier group, charging handle, handguard, and flash hider. You'll need a lower receiver, magazine, and ammunition to fire it. Optics are optional depending on your preference for iron sights or mounted scopes.

What's the advantage of the 1-8 twist rate?

A 1-8 twist rate offers flexibility across a range of bullet weights in .223/5.56, so you're not locked into heavy or light ammunition. This makes it a practical choice for general purpose shooting, hunting, or training where your load selection may vary.