M5E1 6.5 Cm Assembled Upper Hvy 22'' Rifle Threaded Black

The Aero Precision M5E1 6.5 Creedmoor assembled upper receiver with a 22" heavy barrel is built for shooters who demand precision at distance. This is a complete, ready-to-assemble upper that pairs naturally with DPMS Gen I LR-308 lower receivers, making it an excellent foundation for a long-range target rifle or precision hunting build. The 22" barrel length—paired with a rifle-length gas system—delivers the velocity and sight radius serious distance shooters rely on, while the heavy-profile profile maintains accuracy shot after shot without thermal drift.

Aero Precision engineered this upper around accuracy from the ground up. The barrel is 416R stainless steel with a 1-8" twist rate that stabilizes a wide range of 6.5 Creedmoor target projectiles, finished in a matte bead-blasted surface. The rifle-length gas system is intentionally oversized to moderate gas velocity, which translates to smoother, more reliable cycling and less hammer blow on your bolt carrier group and receiver—a detail that matters when you're pushing a rifle hard at the range or in the field. The forged 7075 T6 aluminum receiver is hardcoat anodized in matte black and ships with the ejection port cover and forward assist already installed.

The M5E1 handguard is Aero's Gen 2 Enhanced M-LOK design with an uninterrupted full-length Picatinny rail on top—perfect for mounting optics or accessories without gaps or shifts. M-LOK slots at 3, 6, and 9 o'clock positions accept slings, lights, and other gear, while textured flats on the handguard give you a secure purchase in any condition. Note: this is an upper receiver assembly only—bolt carrier group and charging handle are not included, so you can spec those to your exact preference and budget.

If you're building a 6.5 Creedmoor precision rifle or looking to add a dedicated long-range upper to your inventory, the M5E1 22" heavy barrel checks every box: accuracy, modularity, and proven Aero Precision quality.

Key Features

• 22" heavy-profile 416R stainless steel barrel with matte bead-blasted finish
• 1-8" twist rate optimized for popular 6.5 Creedmoor target loads
• Rifle-length gas system for smooth, reliable cycling and reduced wear
• Forged 7075 T6 aluminum receiver, hardcoat anodized matte black
• Full-length Picatinny top rail with Gen 2 Enhanced M-LOK handguard
• M-LOK accessory slots at 3, 6, and 9 o'clock positions
• QD sling swivel sockets integrated into handguard
• Textured handguard flats for secure grip and aesthetic appeal
• A2-style flash suppressor included; muzzle device threaded
• Ejection port cover and forward assist pre-installed
• Compatible with DPMS Gen I LR-308 lower receivers and clones
• 1.78" inside diameter handguard clears most muzzle devices and 1.5" suppressors

Specifications

Frequently Asked Questions

What lower receiver does the M5E1 6.5 Creedmoor upper fit?

The M5E1 is compatible with DPMS Gen I LR-308 lower receivers and clones. It uses standard .2795" diameter pivot and takedown pins.

Is the bolt carrier group included with this upper?

No. The bolt carrier group and charging handle are not included. This allows you to select and source those components separately based on your performance needs and budget.

What gas system does this 22" barrel use?

This upper features a rifle-length gas system, which moderates gas velocity for smoother, more reliable cycling and reduced component wear compared to shorter gas tubes.

Will a suppressor fit under the handguard?

The handguard has a 1.78" inside diameter, which clears most muzzle devices and 1.5" suppressors. Larger or uniquely shaped suppressors may require checking fit before installation.

Can I use different optics or accessories on this upper?

Yes. The M5E1 features a full-length Picatinny rail on top for optics mounting, plus M-LOK accessory slots at 3, 6, and 9 o'clock positions on the handguard for lights, slings, and other gear.