Aero Precision M5 (.308) Assembled Upper Receiver - For AR10, Anodized, Black APAR308503AC UPC 815421020731
Product Description
The Aero Precision® M5 (.308) Assembled Upper Receiver in Anodized Black (SKU: APAR308503AC / UPC: 815421020731) serves as the industry-standard backbone for building a high-precision, large-frame AR-10, .308 Winchester, or 6.5 Creedmoor semi-automatic rifle. Precision-forged from certified 7075-T6 aluminum to exacting military tolerances, the M5 upper delivers exceptional torsional strength, structural rigidity, and wall-thickness reliability under the heavy recoil impulses of full-power battle rifle and precision hunting cartridges.
This factory-assembled upper receiver comes directly from Aero Precision with the high-strength forward assist assembly and steel ejection port dust cover door pre-installed. Machined to standard DPMS High profile specifications (0.210" tang), it aligns seamlessly with Aero Precision ATLAS handguards as well as third-party DPMS High pattern free-float handguard rails to provide a monolithic, continuous top 1913 Picatinny optic rail.
Engineered with extended M4-style feed ramps to optimize the feeding of heavy ballistic tip, hollow-point, and match-grade .308/6.5 ammunition, the APAR308503AC features laser-engraved T-marks on the flattop rail for quick optic staging. It is finished in a durable, non-reflective MIL-A-8625F Type III Class 2 hardcoat anodized black treatment that resists harsh field abrasion, weather exposure, and aggressive chemical bore cleaners.
*Armorer Bench Notes & Real-World Staging Guidance:*
Fitment Matrix: Direct fit for Aero Precision M5 lower receivers and standard DPMS Gen 1 / LR-308 pattern lowers (utilizing 0.277" pivot/takedown pin geometry). Accepts standard .308 Win / 7.62 NATO / 6.5 Creedmoor / .243 Win large-frame BCGs and barrels. Handguard interface uses DPMS High profile (0.210" tang) and standard 1-7/16"-16 barrel nut threading. Will NOT fit Armalite AR-10A/AR-10B pattern lowers (angular rear cut) or proprietary Rock River LAR-8 receivers.
- Ensure the work area is clean and firearm components are visually and physically verified safe.
- Apply aerosolized or paste aeroshell 33MS / 64 grease evenly to the receiver barrel extension threads.
- Insert your chosen .308 or 6.5 Creedmoor barrel into the receiver extension socket, aligning the barrel alignment pin squarely with the index notch.
- Thread your handguard's barrel nut onto the receiver and torque to the barrel nut manufacturer's specification (typically 45–65 ft-lbs) using a reaction rod or heavy-duty upper receiver vise block.
- Install your gas tube through the cloverleaf gas tube bore and mount your DPMS High profile handguard before staking.
Key Features
- Factory Pre-Assembled Convenience: Arrives with both the forward assist and ejection port cover door pre-installed to streamline bench assembly.
- Forged 7075-T6 Aircraft Aluminum: Precision-forged for extreme structural integrity and high yield strength under heavy .308 recoil.
- DPMS High Profile Spec (0.210" Tang): Matches Aero ATLAS rails and major DPMS High free-float handguards for an unbroken top Picatinny rail plane.
- M4-Style Extended Feed Ramps: Enhances bullet chambering reliability with wide-meplat hunting bullets and long-ogive 6.5 Creedmoor match loads.
- Laser-Engraved T-Marks: Numbered top Picatinny rail slots allow repeatable optic, thermal, and night-vision remounting.
- Standard DPMS Thread Pitch: Uses 1-7/16"-16 UN-2A threads compatible with wide-market LR-308 barrel nuts.
- Type III Class 2 Hardcoat Anodized: Deep matte black military-spec finish offers superior corrosion and scratch protection.
- Made in the USA: Designed, forged, and machined in the United States by Aero Precision.
Product Specifications
- Brand: Aero Precision®
- Model/Series: M5 (.308) Assembled Upper Receiver
- MPN / SKU: APAR308503AC / APAR308503AC
- UPC: 815421020731
- Platform Compatibility: AR-10 / M5 / LR-308 (DPMS Pattern)
- Caliber Compatibility: .308 Win, 7.62x51 NATO, 6.5 Creedmoor, .243 Win, .338 Federal, 8.6 Blackout
- Material: Forged 7075-T6 Aluminum
- Rail Profile: DPMS High Profile (0.210" Tang)
- Barrel Nut Threads: 1-7/16"-16 UN-2A
- Pin Hole Sizing: Standard .277" Pivot / Takedown Pin Holes
- Port Door / Forward Assist: Pre-Installed Factory Assemblies
- Finish: MIL-A-8625F Type III Class 2 Hardcoat Anodized Black
- Country of Origin: United States
