M4E1 Threaded No FA Complete Upper, 11.5" 5.56 Carbine, 10.3" M-LOK S-ONE - FDE Cerakote

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
• 11.5" 5.56 Pistol Length Gov Barrel
• Low Profile Gas Block and Pistol Length Gas Tube
• 10.3" S-ONE Handguard
• 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
• FDE Cerakote Finish
• 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

S-ONE HANDGUARD FEATURES:

• Interrupted 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

11.5" 5.56 PISTOL LENGTH BARREL FEATURES:

• Chamber: 5.56
• Length: 11.5"
• Twist: 1 in 7
• Threading: 1/2"x28
• Finish: QPQ corrosion resistant finish both inside and out
• Gas System Length: Pistol
• M4 Barrel Extension
• HP and MPI Tested