Aero Precision M4E1 Threaded
Stripped Upper Receiver
Polymer 80 Lower Receiver W/ Jig and Bits Combo
The 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 AR-15 barrel nut.
It is forged from 7075-T6 Aluminum, precision machined to work with all mil-spec AR-15 parts and includes the port door and forward assist pre-installed.
The Polymer80, Phoenix2, AR-15 80% Lower and Jig System Includes the Phoenix2 system. This system is designed as a complete kit. There's NO expensive jig kits and parts to purchase - our system is a COMPLETE, all-inclusive package in one price!
The Phoenix, Gen2 version features Polymer80's proprietary polymer composite, a solid core design, stiffened magwell and beefier MILSPEC buffer tube housing. The pistol grip area features a unique no-thread design specific to Polymer80 lowers.
The jig is included in the price of this system The kit comes with drill bits and the end mill bit that's required to finish your AR project the right way.