Aero Precision M4E1 Pistol Lower Complete W/ A2 Grip
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Aero Precision
Overview
The Aero Precision M4E1 Pistol Lower is a complete assembly designed for the AR-15 platform, crafted from durable 7075-T6 aluminum and finished with a hardcoat anodized black coating for enhanced resistance to wear and corrosion. This lower features a standard trigger pin diameter of .154, making it compatible with a wide range of trigger options, and is a versatile choice for builders looking to create a multi-caliber setup. Commonly found in builds utilizing a carbine gas system with a caliber of 5.56 NATO, it offers a solid foundation for a reliable and functional firearm.
Specifications
Available Merchants(3)
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August 2026 on GunPartPicker
Aero Precision M4E1 Pistol Lower Complete W/ A2 Grip ranked #278 of the 507 lower receivers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #334 of the 960 lower receivers builders have added.
It was out of stock everywhere we track for all of August 2026, and today none of the 3 retailers we track has it in stock right now. Listed prices start at $216.99 at KY Gun Company for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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Frequently Built With
The part most often added in each category by the 8 builds that include this one
Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 16in Mid Length Pencil Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black
ALG Defense Qms AR-15 Trigger Set
Bowden Tactical AR-15 Bolt Carrier Group
Badger Ordnance AR-15/M16 Gen 3 Ambidextrous Charging Handle 5.56
Magpul AR-15 CTR Stock Collapsible Mil-Spec Black
Midwest Industries Combat Handguard M-LOK Aluminum 15" Black
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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