Aero Precision M4E1 Threaded Assembled Upper Receiver - Anodized BlackThe 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 our 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. The M4E1

we have found good flow characteristics through a volumetric powder dump

5/64″ Roll Pin Starter Punch

Coating: NIB/MAG-PHOSPHATE HYBRID

Longest lasting lubricity

originally used in military propellant

5/64″ Roll Pin Punch

ULTRA-TOUGH ENGINEERING RESIN HELPS PROTECT GUN FINISHES

Arisaka Defense believes in creating no compromise products that make the accessories on your weapon system more ergonomic and usable

non-flammable

Available in an advanced PVD (Physical Vapor Deposition) matte-black finish

This product is formulated for maximum gun and environmental protection

Perpendicular serrations aren’t all that helpful either