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AeroPrecision
The Aero Precision M5E1 6.5 Creedmoor assembled upper receiver with 18" heavy barrel and mid-length gas system is purpose-built for shooters who want a precise, ready-to-configure foundation for a long-range target rifle. This upper pairs a match-grade 416R stainless steel barrel with the inherently accurate 6.5mm Creedmoor cartridge, making it an excellent choice for precision rifle competitors and long-range hunters. Engineered to fit DPMS Gen I LR-308 lower receivers and compatible clones, the M5E1 ships without a bolt carrier group or charging handle—letting you choose those components to suit your exact build preferences and avoid paying for parts you'd otherwise swap out.
The 18" barrel length with mid-length gas system strikes a balance between maneuverability and velocity, while the extended gas tube design cycles rounds more gently, reducing wear on the receiver, bolt carrier, and gas block. A 1-8" twist rate stabilizes a range of popular target bullets in this caliber. The barrel features a matte bead-blasted finish and comes topped with an A2-style flash suppressor. The upper receiver itself is forged from 7075 T6 aluminum with hardcoat anodized matte black finish—durable and corrosion-resistant through hard use.
Aero Precision's Gen 2 Enhanced M-LOK handguard includes a full-length Picatinny rail running uninterrupted from the rear of the receiver to the muzzle, giving you a rock-solid optics mount and accessory platform. M-LOK slots at the 3/6/9 o'clock positions and QD sling swivel sockets provide flexible mounting options for lights, foregrips, and slings. Textured flats add grip security and visual appeal. The ejection port cover and forward assist come pre-installed, and the pivot and takedown pin holes are precisely machined for reliable function.
| Caliber | 6.5 Creedmoor |
| Barrel Length | 18" |
| Barrel Material | 416R stainless steel |
| Barrel Profile | Heavy |
| Twist Rate | 1-8" |
| Barrel Finish | Matte bead-blasted |
| Gas System | Mid-length |
| Receiver Material | 7075 T6 aluminum, forged |
| Receiver Finish | Hardcoat anodized matte black |
| Compatibility | DPMS Gen I LR-308 lower receivers and clones |
| Handguard | Gen 2 Enhanced M-LOK |
| Top Rail | Full-length Picatinny |
| Handguard Inner Diameter | 1.78" |
| Flash Suppressor | A2-style (included) |
| Included Components | Upper receiver, barrel, handguard, flash suppressor, ejection port cover, forward assist |
| Not Included | Bolt carrier group, charging handle |
The M5E1 is engineered to fit DPMS Gen I LR-308 lower receivers and compatible clones. You'll need to pair it with a lower receiver of that family to complete your build.
Aero Precision omits these components because most precision rifle builders prefer to select them separately based on their specific build goals and preferences. This way you only pay for the exact parts you want to use, rather than replacing stock items.
This M5E1 with the 18" barrel features a mid-length gas system. The extended gas tube design cycles rounds more gently and with less felt recoil compared to carbine-length systems, which also reduces wear on internal components.
The handguard inner diameter is 1.78", which clears most muzzle devices and 1.5" suppressors. The A2-style flash suppressor is installed and can be removed to accommodate a suppressor if desired, though you should verify your specific suppressor's dimensions for a perfect fit.
AeroPrecision
The Aero Precision M5E1 6.5 Creedmoor assembled upper receiver with 18" heavy barrel and mid-length gas system is purpose-built for shooters who want a precise, ready-to-configure foundation for a long-range target rifle. This upper pairs a match-grade 416R stainless steel barrel with the inherently accurate 6.5mm Creedmoor cartridge, making it an excellent choice for precision rifle competitors and long-range hunters. Engineered to fit DPMS Gen I LR-308 lower receivers and compatible clones, the M5E1 ships without a bolt carrier group or charging handle—letting you choose those components to suit your exact build preferences and avoid paying for parts you'd otherwise swap out.
The 18" barrel length with mid-length gas system strikes a balance between maneuverability and velocity, while the extended gas tube design cycles rounds more gently, reducing wear on the receiver, bolt carrier, and gas block. A 1-8" twist rate stabilizes a range of popular target bullets in this caliber. The barrel features a matte bead-blasted finish and comes topped with an A2-style flash suppressor. The upper receiver itself is forged from 7075 T6 aluminum with hardcoat anodized matte black finish—durable and corrosion-resistant through hard use.
Aero Precision's Gen 2 Enhanced M-LOK handguard includes a full-length Picatinny rail running uninterrupted from the rear of the receiver to the muzzle, giving you a rock-solid optics mount and accessory platform. M-LOK slots at the 3/6/9 o'clock positions and QD sling swivel sockets provide flexible mounting options for lights, foregrips, and slings. Textured flats add grip security and visual appeal. The ejection port cover and forward assist come pre-installed, and the pivot and takedown pin holes are precisely machined for reliable function.
| Caliber | 6.5 Creedmoor |
| Barrel Length | 18" |
| Barrel Material | 416R stainless steel |
| Barrel Profile | Heavy |
| Twist Rate | 1-8" |
| Barrel Finish | Matte bead-blasted |
| Gas System | Mid-length |
| Receiver Material | 7075 T6 aluminum, forged |
| Receiver Finish | Hardcoat anodized matte black |
| Compatibility | DPMS Gen I LR-308 lower receivers and clones |
| Handguard | Gen 2 Enhanced M-LOK |
| Top Rail | Full-length Picatinny |
| Handguard Inner Diameter | 1.78" |
| Flash Suppressor | A2-style (included) |
| Included Components | Upper receiver, barrel, handguard, flash suppressor, ejection port cover, forward assist |
| Not Included | Bolt carrier group, charging handle |
The M5E1 is engineered to fit DPMS Gen I LR-308 lower receivers and compatible clones. You'll need to pair it with a lower receiver of that family to complete your build.
Aero Precision omits these components because most precision rifle builders prefer to select them separately based on their specific build goals and preferences. This way you only pay for the exact parts you want to use, rather than replacing stock items.
This M5E1 with the 18" barrel features a mid-length gas system. The extended gas tube design cycles rounds more gently and with less felt recoil compared to carbine-length systems, which also reduces wear on internal components.
The handguard inner diameter is 1.78", which clears most muzzle devices and 1.5" suppressors. The A2-style flash suppressor is installed and can be removed to accommodate a suppressor if desired, though you should verify your specific suppressor's dimensions for a perfect fit.
