The Aero Precision EPC-9 9/40 Threaded Assembled Upper Receiver with LRBHO (APAR620201AC) is the perfect addition to any AR9 build. Including a last-round bolt hold-open mechanism and compatible with most standard AR15 barrel nut and handguard combinations this upper receiver will help take your pistol caliber build to the next level.
- Last round bolt hold-open mechanism
- Accepts most AR15 compatible barrel nuts and handguards
- Dimple above threads to allow for proper handguard timing
- Standard AR15 takedown/pivot pin lug pattern
- Machined from custom forged 7075-T6 aluminum
- Laser engraved T-marks
- Weight: 7 oz
- Upper Receiver
- Pre-installed last round bolt hold open assembly
Note: The EPC last round bolt hold open is ONLY compatible with appropriate GLOCK® pattern magazines.