ATI Milsport AR-15 Complete Upper 5.56 NATO 16"

ATI Milsport Complete Upper Receiver Assembly

The ATI Milsport represents a straightforward, no-nonsense approach to AR-15 upper receiver assemblies. This is a complete upper—everything you need to get rounds downrange when mated to a compatible lower receiver.

What You Get

Barrel and Action

• 16" barrel with 1:8 twist rate for stable bullet performance across a wide range of 5.56 NATO loads
• Phosphate bolt carrier group for reliable cycling and durability
• Micro gas block for consistent operation
• 7075 T6 aluminum upper receiver for strength and light weight

Ergonomics and Accessory Mounting

• 15" free-floating M-LOK rail runs the length of the handguard, providing ample real estate for lights, lasers, and other tactical accessories
• A2 flash hider at the muzzle helps manage muzzle flash signature
• Charging handle included and ready to go

Practical Advantages

This upper is built to MilSpec standards, meaning it will drop onto any standard AR-15 lower receiver without modification. Whether you're building your first rifle or adding to an existing collection, the Milsport upper offers solid performance at a reasonable price point. The free-floating rail design supports accuracy while the 1:8 twist accommodates both lighter and heavier projectiles effectively.

Ready to Shoot

Ships fully assembled and tested. Simply attach to your lower receiver, add ammunition, and you're ready for the range.