M5E1 6.5Cm Assembled Upper Hvy 20'' Rifle Threaded Black

The Aero Precision M5E1 6.5 Creedmoor assembled upper receiver in 20" rifle length is built for shooters serious about accuracy. This is a complete, ready-to-assemble upper that pairs with any DPMS GEN 1 LR-308 lower receiver, making it ideal for hunters and long-range target shooters who want to handpick their bolt carrier group and charging handle. The 20" barrel length strikes a balance between velocity and maneuverability, while the rifle-length gas system cycles smoothly and reduces wear on your components.

Built from 7075 T6 forged aluminum and hardcoat anodized in matte black, the M5E1 receiver is built to last. The barrel is 416R stainless steel with a 1-8" twist rate—a proven choice for stabilizing the range of 6.5 Creedmoor target loads popular today. Aero's extended-length gas tube slows gas velocity for gentler, more reliable operation. The A2-style flash suppressor is already threaded on, and the receiver comes with ejection port cover and forward assist installed, so you're ready to build right away.

The integrated Gen 2 Enhanced M-LOK handguard offers a full-length, gap-free Picatinny rail on top, running from receiver to muzzle end. M-LOK slots at 3/6/9 o'clock positions and QD sling attachment points give you multiple ways to mount optics, lights, and accessories. The 1.78" inner diameter accommodates most muzzle devices and standard suppressors. Textured flats on the handguard provide a secure grip and distinctive look.

Note: bolt carrier group and charging handle are not included, letting you select parts that match your build preferences and avoid paying for components you plan to replace.

Key Features

• 20" 416R stainless steel barrel with 1-8" twist for consistent 6.5 Creedmoor accuracy
• Rifle-length gas system for smooth cycling and reduced component wear
• 7075 T6 forged aluminum receiver, hardcoat anodized matte black
• Full-length Picatinny top rail with Gen 2 Enhanced M-LOK handguard
• M-LOK accessory slots and QD sling mounts at 3/6/9 o'clock positions
• A2-style flash suppressor threaded and installed
• Ejection port cover and forward assist included
• Compatible with DPMS GEN 1 LR-308 lower receivers
• Textured handguard flats for secure grip

Specifications

Frequently Asked Questions

What lower receiver does this fit?

The M5E1 is compatible with DPMS GEN 1 LR-308 lower receivers and clones. Make sure your lower is DPMS GEN 1, as other large-frame platforms use different dimensions.

Does it come with a bolt carrier group and charging handle?

No. The BCG and charging handle are not included. This lets you select components separately based on your preferences and avoids paying for parts you may want to replace.

Can I use a suppressor with this upper?

Yes. The handguard's 1.78" inner diameter clears most muzzle devices and standard 1.5" suppressors. The barrel is threaded and includes an A2-style flash suppressor that can be removed or replaced.

What is the 1-8" twist rate good for?

The 1-8" twist is designed to stabilize a wide range of popular 6.5 Creedmoor target bullets, making it versatile for different loads and shooting applications.