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AeroPrecision
The Aero Precision EPC-9 threaded upper receiver with LRBHO is built for shooters stepping up their AR9 pistol caliber rifle build. This precision-machined upper accepts most standard AR15-compatible barrel nuts and handguards, making it a drop-in fit for existing platforms while adding serious capability. The integrated last round bolt hold open (LRBHO) mechanism gives you tactical feedback when rounds run dry—a feature that separates a refined PCC from a basic one. Finished in Kodiak Brown, it looks as good as it performs on the range or in the field.
Aero Precision machined the EPC-9 from custom forged 7075-T6 aluminum, a material choice that guarantees durability under sustained fire. The threaded barrel design lets you add a suppressor, muzzle brake, or flash hider to tune your rifle exactly how you want it. A dimple above the threads ensures proper handguard timing—Aero's attention to detail means no guesswork during assembly. Laser-enged T-marks help you align your upper and handguard quickly and accurately every time.
The EPC-9 follows the standard AR15 takedown and pivot pin lug pattern, so you can pair it with any compatible lower receiver. The LRBHO assembly comes pre-installed and ready to go—just note that it's designed to work with Glock-pattern magazines, the de facto standard for 9mm pistol caliber builds. If you're building a dedicated 9mm AR or upgrading an existing platform, this upper gives you the kind of fit, finish, and function that justifies the investment.
| Brand | Aero Precision | |
| Model | EPC-9 | |
| Type | Upper Receiver (Threaded) | |
| Caliber/Cartridge | 9mm | |
| Material | Custom Forged 7075-T6 Aluminum | |
| Finish | Kodiak Brown | |
| Compatible Magazine Type | Glock-pattern magazines | |
| LRBHO Included | Yes, pre-installed | |
| Handguard Compatibility | Most AR15-compatible barrel nuts and handguards | |
| Pin Pattern | Standard AR15 takedown and pivot pin lug |
The LRBHO assembly is compatible with Glock-pattern magazines, the standard magazine type for 9mm pistol caliber rifle builds.
Yes. The EPC-9 is designed to accept most standard AR15-compatible barrel nuts and handguards, so it will fit most existing platforms without modification.
Yes. The last round bolt hold open assembly comes pre-installed and ready to use—no additional assembly required out of the box.
The EPC-9 follows the standard AR15 takedown and pivot pin lug pattern, making it compatible with any standard AR15-pattern lower receiver.
AeroPrecision
The Aero Precision EPC-9 threaded upper receiver with LRBHO is built for shooters stepping up their AR9 pistol caliber rifle build. This precision-machined upper accepts most standard AR15-compatible barrel nuts and handguards, making it a drop-in fit for existing platforms while adding serious capability. The integrated last round bolt hold open (LRBHO) mechanism gives you tactical feedback when rounds run dry—a feature that separates a refined PCC from a basic one. Finished in Kodiak Brown, it looks as good as it performs on the range or in the field.
Aero Precision machined the EPC-9 from custom forged 7075-T6 aluminum, a material choice that guarantees durability under sustained fire. The threaded barrel design lets you add a suppressor, muzzle brake, or flash hider to tune your rifle exactly how you want it. A dimple above the threads ensures proper handguard timing—Aero's attention to detail means no guesswork during assembly. Laser-enged T-marks help you align your upper and handguard quickly and accurately every time.
The EPC-9 follows the standard AR15 takedown and pivot pin lug pattern, so you can pair it with any compatible lower receiver. The LRBHO assembly comes pre-installed and ready to go—just note that it's designed to work with Glock-pattern magazines, the de facto standard for 9mm pistol caliber builds. If you're building a dedicated 9mm AR or upgrading an existing platform, this upper gives you the kind of fit, finish, and function that justifies the investment.
| Brand | Aero Precision | |
| Model | EPC-9 | |
| Type | Upper Receiver (Threaded) | |
| Caliber/Cartridge | 9mm | |
| Material | Custom Forged 7075-T6 Aluminum | |
| Finish | Kodiak Brown | |
| Compatible Magazine Type | Glock-pattern magazines | |
| LRBHO Included | Yes, pre-installed | |
| Handguard Compatibility | Most AR15-compatible barrel nuts and handguards | |
| Pin Pattern | Standard AR15 takedown and pivot pin lug |
The LRBHO assembly is compatible with Glock-pattern magazines, the standard magazine type for 9mm pistol caliber rifle builds.
Yes. The EPC-9 is designed to accept most standard AR15-compatible barrel nuts and handguards, so it will fit most existing platforms without modification.
Yes. The last round bolt hold open assembly comes pre-installed and ready to use—no additional assembly required out of the box.
The EPC-9 follows the standard AR15 takedown and pivot pin lug pattern, making it compatible with any standard AR15-pattern lower receiver.
