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AeroPrecision144596912
Aero M4E1-T Pro Upper Receiver Group 14.5 Blk$1,124.30
Availability: In Stock
Current Stock: Out of stock
The Aero Precision M4E1-T Pro Upper Receiver Group in 16-inch black delivers a complete, assembled solution for AR-15 builders who want quality components without the assembly hassle. This upper combines Aero's enhanced M4E1 threaded receiver with the MOD 4 handguard—a purpose-built system designed to minimize deflection and keep your point of impact consistent whether you're running optics, lasers, or iron sights. It arrives ready to drop onto a lower receiver, making it ideal for hunters, range shooters, and tactical builders who value fit and finish.
The MOD 4 handguard is where this upper earns its reputation. Machined from 6061-T6 aluminum and engineered for stiffness, it reduces the point-of-impact shift that can plague setups using infrared laser devices under load. The steel barrel nut plays a key role in that stability. Seven M-LOK slots across the handguard give you full customization options, and four QD sling sockets (three sides plus top) use steel liners to handle repeated deployment cycles without rattle or creep. A full-length top picatinny rail accommodates optics, lights, and other accessories right out of the box.
The barrel is a 16-inch government-profile, cold hammer-forged 5.56 NATO with chrome-line coating for durability. It runs a mid-length gas system with pinned low-profile gas block, keeping the platform soft-shooting and reliable for 3-gun, hunting, or duty work. The M4 feed ramp extension, 1/7 twist, and A2 birdcage round out a no-compromises configuration. HP and MPI tested for peace of mind.
The M4E1 receiver itself features laser-engraved T-marks, M4 feedramps, and Aero's new picatinny profile that pairs seamlessly with their handguard lineup. Port door and forward assist come installed. This is a complete upper that rewards attention to detail and delivers consistent performance.
| Brand | Aero Precision |
| Product | M4E1-T Pro Upper Receiver Group |
| Caliber | 5.56x45mm NATO |
| Barrel Length | 16 inches |
| Barrel Profile | Government |
| Barrel Finish | Chrome-lined |
| Barrel Twist | 1/7 |
| Gas System | Mid-length, pinned low-profile gas block |
| Upper Receiver | M4E1 threaded with M4 feedramps |
| Handguard | MOD 4, 15-inch, 6061-T6 aluminum |
| Handguard Interface | 7-slot M-LOK, full top picatinny rail |
| Sling Mounts | Four QD sockets with steel liners (3, 6, 9 o'clock, top) |
| Flash Hider | Standard A2 birdcage |
| Handguard ID/OD | 1.2" / 1.5" |
| Gas Block Journal | .750 |
| Finish | Black |
| Assembly | Pre-assembled, ready to mount on lower receiver |
Yes. The M4E1-T Pro Upper is compatible with mil-spec AR-15 lower receivers. The .250 takedown pin holes follow standard AR-15 dimensions. Once mounted, you'll have a complete, functioning rifle.
The MOD 4 is permanently installed as part of this upper group. The M4E1 receiver's picatinny profile is optimized for Aero's Enhanced Series handguards, so it's designed to work as a system with the MOD 4 included here.
The M4E1-T designation indicates a threaded upper receiver, but the specs provided detail the barrel threading: the 16-inch barrel comes with a standard A2 birdcage flash hider. The barrel itself is 5.56 NATO and can accept suppressors rated for that caliber if you swap the flash hider for a threaded adapter, though you'll want to verify compatibility with your specific suppressor manufacturer.
The M4E1-T Pro Upper Receiver Group ships complete and assembled with the M4E1 threaded upper receiver, MOD 4 handguard, 16-inch 5.56 barrel, mid-length gas system with pinned low-profile gas block, A2 birdcage flash hider, port door, and forward assist. You do not need to source or assemble any of these components.
SKU: 144596966 • Weight: 5oz
Availability: In Stock
Current Stock: Out of stock
The Aero Precision M4E1-T Pro Upper Receiver Group in 16-inch black delivers a complete, assembled solution for AR-15 builders who want quality components without the assembly hassle. This upper combines Aero's enhanced M4E1 threaded receiver with the MOD 4 handguard—a purpose-built system designed to minimize deflection and keep your point of impact consistent whether you're running optics, lasers, or iron sights. It arrives ready to drop onto a lower receiver, making it ideal for hunters, range shooters, and tactical builders who value fit and finish.
The MOD 4 handguard is where this upper earns its reputation. Machined from 6061-T6 aluminum and engineered for stiffness, it reduces the point-of-impact shift that can plague setups using infrared laser devices under load. The steel barrel nut plays a key role in that stability. Seven M-LOK slots across the handguard give you full customization options, and four QD sling sockets (three sides plus top) use steel liners to handle repeated deployment cycles without rattle or creep. A full-length top picatinny rail accommodates optics, lights, and other accessories right out of the box.
The barrel is a 16-inch government-profile, cold hammer-forged 5.56 NATO with chrome-line coating for durability. It runs a mid-length gas system with pinned low-profile gas block, keeping the platform soft-shooting and reliable for 3-gun, hunting, or duty work. The M4 feed ramp extension, 1/7 twist, and A2 birdcage round out a no-compromises configuration. HP and MPI tested for peace of mind.
The M4E1 receiver itself features laser-engraved T-marks, M4 feedramps, and Aero's new picatinny profile that pairs seamlessly with their handguard lineup. Port door and forward assist come installed. This is a complete upper that rewards attention to detail and delivers consistent performance.
| Brand | Aero Precision |
| Product | M4E1-T Pro Upper Receiver Group |
| Caliber | 5.56x45mm NATO |
| Barrel Length | 16 inches |
| Barrel Profile | Government |
| Barrel Finish | Chrome-lined |
| Barrel Twist | 1/7 |
| Gas System | Mid-length, pinned low-profile gas block |
| Upper Receiver | M4E1 threaded with M4 feedramps |
| Handguard | MOD 4, 15-inch, 6061-T6 aluminum |
| Handguard Interface | 7-slot M-LOK, full top picatinny rail |
| Sling Mounts | Four QD sockets with steel liners (3, 6, 9 o'clock, top) |
| Flash Hider | Standard A2 birdcage |
| Handguard ID/OD | 1.2" / 1.5" |
| Gas Block Journal | .750 |
| Finish | Black |
| Assembly | Pre-assembled, ready to mount on lower receiver |
Yes. The M4E1-T Pro Upper is compatible with mil-spec AR-15 lower receivers. The .250 takedown pin holes follow standard AR-15 dimensions. Once mounted, you'll have a complete, functioning rifle.
The MOD 4 is permanently installed as part of this upper group. The M4E1 receiver's picatinny profile is optimized for Aero's Enhanced Series handguards, so it's designed to work as a system with the MOD 4 included here.
The M4E1-T designation indicates a threaded upper receiver, but the specs provided detail the barrel threading: the 16-inch barrel comes with a standard A2 birdcage flash hider. The barrel itself is 5.56 NATO and can accept suppressors rated for that caliber if you swap the flash hider for a threaded adapter, though you'll want to verify compatibility with your specific suppressor manufacturer.
The M4E1-T Pro Upper Receiver Group ships complete and assembled with the M4E1 threaded upper receiver, MOD 4 handguard, 16-inch 5.56 barrel, mid-length gas system with pinned low-profile gas block, A2 birdcage flash hider, port door, and forward assist. You do not need to source or assemble any of these components.
SKU: 144596966 • Weight: 5oz