AeroPrecision167529634
Epc-9 9Mm/40 S&W Assembled Upper Receiver W/Lrbho Fde$219.99
Availability: In Stock
Current Stock: Out of stock
The Aero Precision EPC-9 assembled upper receiver is a complete solution for builders looking to run 9mm or .40 S&W in an AR platform. Built on a one-piece forged design, this upper combines the receiver and handguard mounting surface into a single unit—eliminating complexity and adding rigidity. It ships with the last round bolt hold open (LRBHO) assembly already installed, the barrel nut, and the nut wrench you'll need to get started. Drop in your barrel assembly, torque it down, slide on a compatible handguard, and you're ready to run.
The engineering here is solid: the integrated mounting platform and receiver are machined from the same 7075-T6 aluminum forging, which means no flex between components and no stacked tolerances. Aero cut strategic lightening features into the design without sacrificing strength, and the whole thing needs just eight screws to mount a free-floated rail. The upper features standard AR15 takedown and pivot pin lugs, so it plays well with existing parts kits.
One important detail: the LRBHO mechanism is only compatible with GLOCK-pattern magazines. If that matches your magazine preference, you get the practical advantage of the bolt locking back on the last round—no guessing whether you're dry. The upper is cut for Aero's Enhanced and Quantum handguard lines, giving you modular rail options without hunting for adapters.
This is a thoughtfully engineered platform for anyone building a reliable 9mm or .40 S&W AR. Whether you're setting up a suppressed host, a practical trainer, or a competition gun, the EPC-9 gives you a solid foundation and saves you assembly time out of the box.
| Brand | Aero Precision |
| Caliber | 9mm / .40 S&W |
| Material | 7075-T6 Aluminum (custom forged) |
| Design | One-piece integrated upper receiver and handguard mount |
| Bolt Hold Open | Last round bolt hold open (GLOCK-pattern magazines) |
| Pin Pattern | Standard AR15 takedown/pivot pin lug |
| Finish | Black |
| Included Accessories | Pre-installed LRBHO assembly, barrel nut, barrel nut wrench |
| Handguard Compatibility | Aero Precision Enhanced and Quantum handguards |
The last round bolt hold open mechanism is compatible with GLOCK-pattern magazines only. If you're running a different magazine platform, the LRBHO may not function as intended.
The EPC-9 is designed to work with Aero Precision's Enhanced and Quantum handguard lineup. The integrated one-piece mounting surface is optimized for these rails.
No. The last round bolt hold open assembly comes pre-installed on this upper, so you can move straight to mounting your barrel and handguard.
You receive the assembled upper receiver with LRBHO already installed, an enhanced barrel nut, and a barrel nut wrench. You'll need to source the barrel assembly and handguard separately.
SKU: 167528092 • Weight: 1.1oz
Availability: In Stock
Current Stock: Out of stock
The Aero Precision EPC-9 assembled upper receiver is a complete solution for builders looking to run 9mm or .40 S&W in an AR platform. Built on a one-piece forged design, this upper combines the receiver and handguard mounting surface into a single unit—eliminating complexity and adding rigidity. It ships with the last round bolt hold open (LRBHO) assembly already installed, the barrel nut, and the nut wrench you'll need to get started. Drop in your barrel assembly, torque it down, slide on a compatible handguard, and you're ready to run.
The engineering here is solid: the integrated mounting platform and receiver are machined from the same 7075-T6 aluminum forging, which means no flex between components and no stacked tolerances. Aero cut strategic lightening features into the design without sacrificing strength, and the whole thing needs just eight screws to mount a free-floated rail. The upper features standard AR15 takedown and pivot pin lugs, so it plays well with existing parts kits.
One important detail: the LRBHO mechanism is only compatible with GLOCK-pattern magazines. If that matches your magazine preference, you get the practical advantage of the bolt locking back on the last round—no guessing whether you're dry. The upper is cut for Aero's Enhanced and Quantum handguard lines, giving you modular rail options without hunting for adapters.
This is a thoughtfully engineered platform for anyone building a reliable 9mm or .40 S&W AR. Whether you're setting up a suppressed host, a practical trainer, or a competition gun, the EPC-9 gives you a solid foundation and saves you assembly time out of the box.
| Brand | Aero Precision |
| Caliber | 9mm / .40 S&W |
| Material | 7075-T6 Aluminum (custom forged) |
| Design | One-piece integrated upper receiver and handguard mount |
| Bolt Hold Open | Last round bolt hold open (GLOCK-pattern magazines) |
| Pin Pattern | Standard AR15 takedown/pivot pin lug |
| Finish | Black |
| Included Accessories | Pre-installed LRBHO assembly, barrel nut, barrel nut wrench |
| Handguard Compatibility | Aero Precision Enhanced and Quantum handguards |
The last round bolt hold open mechanism is compatible with GLOCK-pattern magazines only. If you're running a different magazine platform, the LRBHO may not function as intended.
The EPC-9 is designed to work with Aero Precision's Enhanced and Quantum handguard lineup. The integrated one-piece mounting surface is optimized for these rails.
No. The last round bolt hold open assembly comes pre-installed on this upper, so you can move straight to mounting your barrel and handguard.
You receive the assembled upper receiver with LRBHO already installed, an enhanced barrel nut, and a barrel nut wrench. You'll need to source the barrel assembly and handguard separately.
SKU: 167528092 • Weight: 1.1oz