M4E1 Threaded Complete Upper, 16" .223 Wylde Fluted SS Mid-Length Barrel, 15" M-LOK S-ONE Handguard - Anodized Black

This complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Our 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.

Includes:

M4E1 Threaded Assembled Upper Receiver
ATLAS S-ONE Handguard of choice
16" .223 Wylde Fluted Mid-Length Stainless Steel Barrel
Low Profile Gas Block and Mid-Length Gas Tube
Product comes assembled
This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tab

M4E1 Threaded Upper Receiver Features:

New enhanced forging that gives the upper receiver a "billet look"
New picatinny profile that blends seamlessly with our Enhanced Series Handguards
M4 Feedramps
.250 takedown pin holes
Laser engraved T-marks
Includes port door and forward assist installed

ATLAS S-ONE Handguard Features:

Front and rear picatinny rail
Eliminated center of top rail for weight reduction
Indexing grooves in 12:00 position for positive grip control
Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
Compatible with low profile gas blocks
1.3” Inside diameter
1.5” Outside diameter
Compatible with mil-spec AR15 upper receivers and barrels
Learn More about our NEW ATLAS S-ONE Hanguards

16" .223 Fluted Stainless Steel Mid-Length Barrel Features:

.223 Wylde 16" Mid-Length Barrel, 1/8 Twist
416R Stainless Steel
Bead Blasted Finish
.750 gas block journal
Mid-length gas system
M4 Feed Ramp Extension
HP and MPI tested
Standard A2 flash hider
ALL NEW Fluted Design
Barrel Weight: 27 oz