Aero Precision M4E1 5.56 Nato 16" Kodiak Brown Upper Receiver APAR700392M7

This complete upper features the S-ONE Handguard, purpose-built for lightweight AR builds. The S-ONE line balances minimal size and weight with the strength and rigidity demanded by serious shooters. The handguard uses Aero Precision’s proprietary attachment system for a reliable, streamlined mounting platform that maintains a sleek profile without sacrificing stability.

Note: BCG and Charging Handle not included.
Important: This is a blemished product. Fully functional but may have cosmetic imperfections. All sales on blemished items are final.

Includes:

• M4E1 Threaded Assembled Upper Receiver

• 15" S-ONE M-LOK Handguard – Your Choice of Finish

• 16" 5.56 CMV Barrel

• Low Profile Gas Block and Mid-Length Gas Tube

• Fully assembled

M4E1 Threaded Upper Receiver Features:

• Enhanced forging for billet-like aesthetics

• Seamless Picatinny rail transition with Enhanced Series handguards

• M4 feed ramps

• .250 takedown pin holes

• Laser-engraved T-marks

• Forward assist and port door installed

S-ONE Handguard Features:

• Front and rear Picatinny rail sections

• Lightweight design with center-top rail section removed

• 12 o’clock indexing grooves for positive grip control

• QD sling sockets at 3, 6, and 9 o'clock

• Compatible with low-profile gas blocks

• Internal Diameter: 1.3"

• External Diameter: 1.5"

• Compatible with mil-spec AR15 uppers and barrels

16" 5.56 Barrel Specs:

• 4150 CrMoV steel with QPQ finish

• 5.56 NATO, 1:7 twist, mid-length gas system

• .750 gas block journal, .0785 gas port

• M4 feed ramp extension

• High Pressure (HP) and Magnetic Particle Inspected (MPI)

• Standard A2 flash hider