Aero Precision Gen 2 M4E1 Combo


Aero Precision Gen 2 M4E1 Combo


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Gen 2 M4E1 Combo – With Handguard

Gen 2 M4E1 Combo includes M4E1 Upper Receiver and a Gen 2 Handguard.

Aero Precision M4E1 Enhanced Upper Receiver

Gen 2 M4E1 Combo / Enhanced Upper Receiver is a one-piece design combining the handguard mounting platform with the upper itself. Through superior engineering, we have condensed the parts needed to mount a free-floated handguard to a mere 8 screws. Since the handguard mounting surface and upper are of the same forging, not only is it a stronger system, but we are able to make additional lightening cuts to save weight and allow for more efficient cooling.

Ease of installation ? Simply insert your barrel assembly into the M4E1 upper, tighten it using the provided barrel nut and wrench, slide your rail on and tighten the rail screws. Within minutes you have a modular, free-floated rail.

The M4E1 Enhanced Upper features M4 feedramps, .250 takedown pin holes, laser engraved T-marks, and comes assembled with dust cover and forward assist. The M4E1 Enhanced Upper works with Aero Precision handguards. Lastly, the M4E1 Upper is not piston-kit compatible.

Aero Precision AR15 Gen 2 Enhanced Handguard

New Gen 2 Features include a quick disconnect sling socket at the 3, 6, and 9 0’clock positions; additional milling along flats to aid with grip and visual appeal, and their new profile for a continuous picatinny top rail.

Aero Precision Gen 2 Enhanced Handguard provides a lightweight free float design for your custom AR15 build. The KeyMod system allows advanced modularity past the current 1913 picatinny rail system. Machined to mil-spec dimensions and engineered to perfection, this handguard eliminates bulk while retaining strength and stability. The AR15 Enhanced KeyMod Handguard features a 1 piece free float design, with built in anti-rotation tabs. Rails are scalloped to prevent snags and the top rail is continuous. The inside 1.8″ diameter is compatible with low profile gas blocks, fits most muzzle devices and 1.5″ suppressors.

Arm or Ally is proud to team up with Aero to bring you some of the finest AR15 components available at affordable prices. So, be sure to check out our Aero Precision Bolt Carrier Groups, and barrels by Ballistic Advantage.

Technical Information

BLK Item#: APAR640231PS | APAR640231MS | APAR640231QS | APAR640251PS | APAR640251MS | APAR640251QS
FDE Item#: APAR640232PS | APAR640232MS | APAR640232QS | APAR640252PS | APAR640252MS | APAR640252QS
Manufacturer: Aero Precision
Type: M4E1 Combo (M4E1 Upper Receiver | Gen 2 Enhanced Handguard)
Platform: AR15 – Multi Caliber
Material: Machined from: Gen 2 Handguard – 6061-T6 | M4E1 AR15 Receiver – 7075-T6
Finish: Anodized Black
Screw Torque: 25in-lbs
MSRP: 12″ Blk $269.09 | 15″ Blk $296.09 | 12″ FDE $314.09 | 15″ FDE $341.09

Additional information

Weight 11 oz

Aero Precision


Handguard, Upper Receiver, Upper Receiver Parts




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