M4E1 Threaded ATLAS S-ONE 5.56 Complete Uppers - Selectable Barrel and Handguard options and Finish
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Product Description
M4E1 Threaded ATLAS S-ONE 5.56 Complete Uppers include the new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. The 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.
All complete uppers include:
- M4E1 Threaded Upper Receiver
- ATLAS S-ONE Handguard - some configurations have length options
- CMV Barrel - choice of length and gas system
- Barrel option - pinned and welded VG6 Epsilon 556SL option available with 14.5" Black Carbine and Mid-length configurations
- Low profile gas block and gas tube to suit barrel
- This complete upper does not include a BCG or Charging Handle
M4E1 Threaded Upper Receiver Features:
- New enhanced forging that gives the upper receiver a "billet look"
- New picatinny profile that blends seamlessly with the Enhanced Series Handguards
- M4 Feedramps
- .250 takedown pin holes
- Laser engraved T-marks
- Includes port door and forward assist installed
ATLAS S-ONE Handguard Features:
- Front and rear picatinny rail
- Eliminated center of top rail for weight reduction
- Indexing grooves in 12:00 position for positive grip control
- 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
5.56 Barrel Features:
- Chamber: 5.56
- Twist: 1 in 7
- Threading: 1/2"x28
- Material: 4150 Chrome Moly Vanadium
- Finish: QPQ corrosion resistant finish
- Gas Block: .750 (note exceptions below)
- Gas System:Â some barrel lengths have choice of gas system
- M4 Barrel Extension
- HP and MPI Tested
Note:
- 14.7" barrels can be pinned and welded with a standard A2 flash hider to yield an overall length of 16+"
- 14.7" Pencil profile barrels require a .625 diameter gas block
- 14.5" barrels with a pinned and welded VG6 Epsilon 556SL yield a 16+" overall length
- The VG6 Epsilon 556SL has a .745" outside diameter, permitting full maintenance and removal of your gas block without having to remove the muzzle device
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