M4E1 Threaded 13.9" 5.56 Mid-Length No Forward Assist Complete Upper w/ 12.7" M-LOK S-ONE Handguard - Kodiak Brown Anodized
M5E1 Enhanced 16" .308 Mid-Length SS Complete Upper w/ 15" Enhanced M-LOK Handguard & Adjustable Gas Block - Anodized Black
M5E1 Complete Upper, 16" .308 Mid-Length Barrel w/ 15" Enhanced M-LOK Handguard & Adjustable Gas Block - Anodized Black
NOTE: This part features a colored anodized finish. These finishes are held to different aesthetic standards than parts finished in black anodizing or Cerakote. For more information on colored anodizing visit our Knowledge Center.
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. The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to 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.
Includes:
- M4E1 Threaded Assembled No Forward Assist Upper Receiver
- 12.7" ATLAS S-ONE M-LOK Handguard
- 13.9" 5.56 Mid-Length 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 Threaded No Forward Assist Upper Receiver Features:
- 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
- Includes port door installed
Slimline 15 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
13.9" 5.56 M4 CMV Barrel, Mid-Length Features:
- 5.56 Nato 13.9" 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
| Tang Height | No |
|---|---|
| Muzzle Device Pinned | No |
| ATF Regulated | No |
| FFL Item | No |
| Made In America? | Yes |
| Platform | AR15 |
| Series | R-ONE/S-ONE |
| Caliber | 5.56 NATO |
| Barrel Length | 13.9" |
| Finish | Kodiak Brown Anodized |
| Weight(s) | - |
| Other | N/A |