Aero Precision’s M4E1 5.56mm 10.5" Carbine Upper Receiver comes fully assembled, lacking only a bolt/carrier group and charging handle - the two most popular components for customization. At its heart is Aero’s forged M4E1 receiver that combines the look of a custom billet receiver with "mil-spec" parts compatibility (including BCG and charging handle) and a proprietary attachment system for the included handguard. Aero has fitted the M4E1 5.56mm 10.5" Carbine Upper Receiver with a barrel of high-grade 4150 chrome-moly-vanadium carbon steel chambered for 5.56mm NATO ammunition, so it will safely handle civilian .223 Remington ammo too. The versatile 10.5" length is short enough for an AR-15 pistol build OR for a compact, fast-handling SBR (short barreled rifle) - with the proper NFA paperwork, of course. The longer carbine-length gas tube helps promote reliable cycling in either configuration.
The Aero Precision M4E1 5.56mm 10.5" Carbine Upper Receiver comes with Aero’s latest Gen 2 Enhanced M-LOK Handguard installed. Handguard and receiver form a rock-solid, monolithic platform for mounting accessories, starting with the full-length Picatinny top rail. Plenty of attachment points for installing M-LOK- accessories exactly where you want them, plus QD sling swivel sockets at the 3/6/9 o’clock positions. You can get your M4E1 5.56mm 10.5" Carbine Upper with a 7" handguard featuring a front sight base gas block, or a 9" handguard with a low profile gas block. Texture milled into the flats give you a better grip and add to your gun’s unique appearance.
INCLUDES:
- M4E1 Enhanced Assembled Upper Receiver
- Enhanced Handguard of choice
- 10.5" 5.56 Carbine Length CMV Barrel
- Pinned FSB and Carbine Length Gas Tube
- Product comes assembled
- This assembled upper does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tab
- The muzzle brake that comes with this assembled upper receiver is NOT pinned nor welded to this barrel. Per the National Firearms Act, the muzzle brake MUST be pinned and welded to achieve the necessary 16" as defined by the ATF for a rifle build.
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
GEN 2 ENHANCED HANDGUARD FEATURES:
- 1pc free float design
- Built in anti-rotation tabs
- Scalloped rails
- Continuous top rail
- 1.78" inside diameter fits most muzzle devices and 1.5" suppressors
- Compatible with low profile gas blocks
- Gen 2 Feature - Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
- Gen 2 Feature - Additional milling along flats to aid with gripping and add visual appeal
- Gen 2 Feature - New profile for the continuous picatinny top rail
10.5" BARREL W/ PINNED FSB FEATURES:
- 5.56 Nato, 10.5" carbine gas, 1/7 twist, 4150 CrMoV, with F marked FSB taper pin
- .750 gas block journal
- Carbine gas system
- M4 Feed Ramp Extension
- HP and MPI tested
- Weight: 34 oz
- Front sight block comes stripped, no sight post or sling swivel
- Standard A2 flash hider
Restricted Part
Please check with your state regulations for ownership of Restricted Parts. May require documentation.
