Buy now!
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 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. This handguard maintains a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.
Includes:
M4E1 Threaded Assembled No Forward Assist Upper Receiver
9.3" Slimline Handguard
10.5" 5.56 Government Profile CMV Barrel, Carbine Length
Low Profile Gas Block and Carbine Length Gas Tube
AR15 A2 Birdcage Flash Hider
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
SLIMLINE HANDGUARD FEATURES:
Full top picatinny rail for optional attachments
Full length MLOK attachment points 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
NOT Compatible with M4E1 Enhanced Upper Receivers
10.5" 5.56 Barrel Features:
5.56 Nato 10.5" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
.750 gas block journal
Carbine length gas system, .0785 gas port
M4 Feed Ramp Extension
HP and MPI tested
Standard A2 flash hider