Aero Precision APAR620111M85: This EPC-9 Complete Upper Receiver comes standard with Aero Precision's ATLAS S-ONE Handguard. The S-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Aero Precision's proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards. This complete upper receiver does not include BCG or Charging Handle.Includes: EPC-9 Upper Receiver 7.3" ATLAS S-ONE Handguard 8.3" 9mm CMV Barrel Product comes assembled The muzzle device included with this complete upper receiver is NOT pinned nor welded to this barrel.