AERO M4E1 ASSEMBLED UPPER KODIAK BRN Removable Cord 308) lower parts kit helps

308) lower parts kit helps you to build a custom

960 Feet per second

utilizing CFD (Computational Fluid Dynamics) and CAE (Computer Aided Engineering)

25" Internal height 10

Sizes and Light Heads: Available in both full-size 18650 and Micro 18350 configurations

AERO M4E1 ASSEMBLED UPPER KODIAK BRN Removable Cord 308) lower parts kit helpsThe M4E1 Threaded Upper Receiver features a new angular machined design that helps it stand apart from standard mil spec upper receivers. This upper receiver features the same enhanced body profile as their M4E1 Enhanced Upper Receiver but is threaded to accept a standard AR15 barrel nut. It is forged from 7075 T6 Aluminum, precision machined to work with all mil spec AR15 parts and includes the port door and forward assist pre installed. Features :