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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.
Includes:
M4E1 Enhanced Assembled Upper Receiver
16" 5.56 Mid-Length Gov 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 Upper Features:
Forged from 7075 T6 aluminum
Precision machined to M4E1 specs
M4 feedramps
Matte black hard coat anodized Mil 8625 Type 3 Class 2
Laser engraved T-marks
Comes assembled, with port door and forward assist installed
Accepts standard AR15/M16 components
Handguard mounting platform is forged into the receiver
Works with Aero Precision handguards but also fits most BAR-system handguards
Barrel nut and wrench are included
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
16" 5.56 Mid-Length Barrel Features:
Chamber: 5.56
Length: 16"
Twist: 1 in 7
Threading: 1/2"x28
Finish: QPQ corrosion resistant finish both inside and out
Gas System Length: Mid
Weight: 52oz
M4 Barrel Extension
HP and MPI Tested