** Product pictured is California Legal as is and does not require CA Compliant parts or modification. CA Compliant parts are buyer's responsibility when built into rifle. **
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This complete upper receiver features the same tried-and-true construction and aesthetics as our M4E1 Threaded Upper Receivers, without provisions for a forward assist. The included ATLAS S-ONE Handguard is designed with size and weight in mind. Featuring a trimmed down top rail to help minimize weight and overall profile. 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 Upper Receiver, No Forward Assist
15" ATLAS S-ONE Handguard
16" 5.56 CMV Barrel
Low Profile Gas Block and Mid-Length Gas Tube
Port Door Assembly
A2 Flash Hider
This complete upper receiver does not include BCG or Charging Handle.
M4E1 Threaded, No Forward Assist Upper Receiver Features:
No Forward Assist
Custom enhanced forging that gives the upper receiver a "billet look" while maintaining the structural integrity of a forged part.
Picatinny profile that blends seamlessly with our Enhanced and ATLAS Series Handguards
M4 Feedramps
.250 takedown pin holes
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
1.3" Inside diameter
1.5" Outside diameter
Compatible with mil-spec AR15 upper receivers and barrels
MLOK attachment points
16" 5.56 Barrel Features:
5.56 NATO 16" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
.750 gas block journal
Mid length gas system, .0785 gas port
M4 Feed Ramp Extension
HP and MPI tested
Standard A2 flash hider
