ATI Milsport 16 Inch 300 Blackout Upper Receiver

Description

The ATI Milsport 16 inch 300 blackout upper is a complete AR-15 upper receiver assembly designed for shooters seeking reliable performance and versatility in the .300 AAC Blackout platform. Built around a 16″ .300 BLK barrel, this upper delivers optimal ballistic performance while maintaining compatibility with standard AR-15 lower receivers.

A 15″ free-float M-LOK handguard provides ample space for mounting optics and accessories while preserving a lightweight, streamlined profile. The 5/8×24 threaded muzzle supports common .30-caliber muzzle devices, and the included polymer flip-up sights offer immediate backup sighting capability right out of the box.

Manufactured in the USA, the ATI Milsport upper is an excellent option for range use, hunting applications, or general-purpose AR builds where dependable function and modularity are priorities.

Technical Specifications

• Platform: AR-15

• Caliber: .300 AAC Blackout

• Barrel Length: 16″

• Handguard Length: 15″

• Handguard Type: Free-Float M-LOK

• Muzzle Thread Pitch: 5/8×24

• Sights Included: Polymer Flip-Up Sights

• Upper Type: Complete Upper Receiver Assembly

• Compatibility: Standard AR-15 lower receivers

• Country of Origin: USA