Aero Precision M4E1-E 18" Rifle 6MM ARC EM15 Complete Upper - Anodized - APAR600218M90

Aero Precision M4E1-E 18″ Rifle 6MM ARC EM15 Complete Upper – Anodized

The Aero Precision M4E1-E 18″ 6MM ARC Complete Upper is designed to squeeze every bit of ballistic performance from the 6MM ARC cartridge. Whether you’re competing, hunting at distance, or dialing in for precision rifle roles, this upper delivers repeatable accuracy and rugged reliability in a streamlined, modern package. The enhanced M4E1 receiver and EM15 handguard create a monolithic interface that minimizes flex and maximizes consistency, while the 18” SPR barrel pushes projectiles with optimal velocity for long-range impact.

Features

• M4E1 Enhanced Upper Receiver: Machined from 7075-T6 aluminum and paired with Aero’s signature barrel nut-less design, this receiver delivers a more secure and consistent handguard-to-upper interface. The black anodized finish ensures long-term corrosion protection in harsh conditions.
• EM15 Enhanced Handguard: Threaded directly into the upper for a rock-solid lockup. M-LOK slots at the 3, 6, and 9 o’clock positions, along with a full-length top Picatinny rail, give you the flexibility to mount optics, lasers, bipods, and more—without compromising rigidity.
• 6MM ARC Chambering: Developed by Hornady for accuracy and extended range from an AR-15 platform. The 18″ SPR profile barrel with a 1:7 twist is optimized for heavier, high-BC projectiles. This configuration delivers supersonic performance beyond 1,000 yards.
• Rifle-Length Gas System: Ensures smoother cycling and reduced felt recoil, improving shooter control and system longevity during extended shooting sessions.

Specifications

• Caliber: 6MM ARC
• Barrel Length: 18″
• Twist Rate: 1:7
• Barrel Profile: SPR
• Gas System: Rifle Length
• Gas Block Journal: .750″
• Upper Receiver: M4E1 Enhanced (7075-T6 aluminum)
• Handguard: EM15 Enhanced M-LOK Free-Float
• Finish: Anodized Black
• Platform: AR-15
• Compatibility: Mil-Spec AR-15 lowers
• Bolt Carrier Group / Charging Handle: Not included

Compatible with any mil-spec AR-15 lower receiver. Bolt carrier group and charging handle sold separately unless otherwise noted.