This complete upper receiver incudes an HBAR profile barrel that is laser marked "HBAR".
Includes:
- M4E1 Assembled Upper Receiver
- 15" ATLAS R-ONE M-LOK Handguard
- 16" 5.56 HBAR 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
ATLAS R-ONE Handguard Features:
- Full top picatinny rail for optional attachments
- Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
- 1.3" Inside diameter
- 1.5" Outside diameter
- Compatible with mil-spec AR15 upper receivers and barrels
- MLOK attachment points
16" 5.56 HBAR Barrel
- 5.56 Nato 16" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled
- .750 gas block journal
- Mid-Length Gas System
- M4 Feed Ramp Extension
- HP and MPI tested
- Standard A2 flash hider
