M4E1 Threaded No Forward Assist Complete Upper, 10" .300 Blackout Pistol, 9.3" M-LOK R-ONE - Anodized Black

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
• 10" .300 Blackout Pistol Length Gov Barrel
• Low Profile Gas Block and Pistol Length Gas Tube
• 9.3" R-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
• Anodized Black 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

R-ONE 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

10" .300 PISTOL LENGTH BARREL FEATURES:

• Chamber: .300 Blackout
• Length: 10"
• Twist: 1 in 7
• Threading: 5/8"x24
• Finish: QPQ corrosion resistant finish both inside and out
• Gas System Length: Pistol
• M4 Barrel Extension
• HP and MPI Tested