APPG700601 - Aero Precision M4E1 Threaded Upper/ATLAS R-ONE Combo Set M-LOK
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Aero Precision M4E1 Threaded Upper/ATLAS R-ONE M-LOK Combo Set

Price: $339.99
SALE PRICE: $250.73
  • Item #: APPG700601
  • Manufacturer: Aero Precision
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  • M4E1 Threaded Assembled Upper Receiver
  • ATLAS R-ONE Handguard of choice
  • Handguard Mounting Hardware


ATLAS R-ONE Handguard

The ATLAS R-ONE is the newest addition to the Aero Precision Handguard lineup. Machined from 6061-T6 Aluminum, the R-ONE line of handguards are designed with size and weight in mind, providing the perfect handguard for your lightweight build. 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.

Available in KeyMod™ and M-LOK® profiles with 12” and 15” options (7” and 9” options coming soon).


  • Full top picatinny rail for optional attachments
  • Quick disconnect sling socket 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


M4E1 Threaded Assembled Upper Receiver

The M4E1 Threaded Assembled Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as our M4E1 Enhanced Upper Receiver but is threaded to accept a standard AR15 barrel nut. It is forged from 7075-T6 Aluminum, precision machined to work with all mil-spec AR15 parts and includes the port door and forward assist pre-installed. Get the billet look without paying the billet price!


  • 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 (not on FDE models)
  • Includes port door and forward assist installed


Upper/Handguard Combo Product SKU's:

APAR700705S - 15" MLOK BLACK

APAR700704S - 12" MLOK BLACK



APAR700715S - 15" MLOK FDE

APAR700714S - 12" MLOK FDE

APAR700712S - 9" MLOK FDE

APAR700711S - 7" MLOK FDE
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