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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 slimline line of handguards have a unique milling profile, designed to maximize grip ergonomics and minimize weight while still providing plenty of real-estate to accommodate any attachment needs the end user may have. 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 Assembled Upper Receiver without Forward Assist
Slimline Handguard
16" 5.56x45mm NATO Carbine-Length M4 Barrel
Low Profile Gas Block and Carbine-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 Upper With No Forward Assist 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
Slimline Handguard Features:
Full top picatinny rail for optional attachments
Full length MLOK attachment points at the 3, 6, and 9 o’clock positions
Continuous top rail
Compatible with low profile gas blocks
1.3” Inside diameter
1.5” Outside diameter
Compatible with mil-spec AR15 upper receivers and barrels
NOT Compatible with M4E1 Enhanced Upper Receivers
16" 5.56 Carbine-Length Barrel Features:
5.56x45mm NATO
QPQ Finish
M4 Profile
.750" gas block journal
Carbine-Length gas system
M4 Feed Ramp Extension
HP and MPI tested
Standard A2 Flash Hider