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Aero Precision
Overview
The Aero Precision M4E1 Complete Lower Receiver comes fully assembled and ready to integrate into your AR-15 build. Constructed from durable 7075-T6 aluminum, it features a hardcoat anodized finish for enhanced resistance to wear and corrosion. With a trigger pin diameter of .154 inches, this lower receiver is compatible with standard trigger components and is designed for use with the 5.56 NATO caliber, making it a solid choice for a variety of configurations, particularly those utilizing a mid-length gas system.
Aero Precision M4E1 Complete Lower Receiver W/MOE SL Grip & SL-S Carbine Stock
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Aero Precision M4E1 Complete Lower Receiver W/MOE SL Grip & SL-S Carbine Stock was the third most added lower receiver on GunPartPicker in August 2026, behind the Smith & Wesson M&P15 Complete Lower 5.56x45mm/.223 Remington, Black - 812002, with about 6% of all lower receivers added to builds. Down from #2 in May, June and July. Builds with this lower receiver are mostly chambered in 5.56 NATO (74%, then .223 Wylde 14%), mostly on mid-length gas (62%, then carbine-length 18%), and nearly all AR-15.
It was out of stock everywhere we track for all of August 2026, and today none of the 4 retailers we track has it in stock right now. Listed prices start at $233.99 at KY Gun Company for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 30 retailers
We ranked every lower receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Lower Receiver Trends →The part most often added in each category by the 1,753 builds that include this one
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Aero Precision M4e1 Complete Lower Receiver W/moe Sl Grip & Sl-S Carbine Stock
| Build | Parts | Total |
|---|---|---|
 | 5 | $1924.47 |
 | 14 | $2845.14 |
 | 8 | $1858.63 |
 | 16 | $4642.94 |
| 25 | $1835.22 |
| 10 | $3867.18 |
 | 6 | $945.22 |
| 13 | $1199.82 |
 | 9 | $1463.09 |
 | 6 | $1251.06 |
 | 8 | $2604.45 |
| 15 | $3946.65 |
8 global ratings
Top reviews
Aero M4E1 complete lower with MOE SL grip and SL-S stock arrives ready to go. Machining is precise on the receiver. Mate to my Aero upper has zero rattle. Trigger is mil-spec but easily replaceable. Solid complete lower.
Aero M4E1 complete lower with MOE SL grip and SL-S stock punches above its price tier. Anodize is consistent with my Aero upper. Trigger is mil-spec but functional. Solid base for any build, recommend it. Drop in mate to any upper.
lower ships complete with the LPK and MOE-SL stock already on, all you do is mate it to an upper. anodize is even, no thin spots near the magwell. saves a couple hours of LPK build time for anyone new to AR builds
tolerances are tight and the finish is consistent. great upgrade
M4E1 complete from Aero with the MOE SL grip and SL-S stock is the easy mode of starting a build. Everything is in spec, takedown pins detent correctly. Anodize matches my Aero upper exactly. Trigger is a basic milspec but you can drop in any aftermarket trigger easily.
Aero M4E1 complete lower with MOE SL grip and SL-S stock mates perfectly with my Aero M4E1 upper. Anodize matches between receivers. Mil-spec trigger is functional. The complete lower saves time over piecing it together yourself.
Aero Precision M4E1 complete lower with MOE SL grip and SL-S stock took about a minute to mate to an upper. Receiver is well machined. Anodize matches Aero uppers. Solid receiver for the money - a complete lower at fair pricing.
complete aero lower with MOE-SL grip and stock pre installed. saves the LPK build step. tolerances against an aero upper are tight, takedown pins slip with thumb pressure. integrated trigger guard is the standard aero touch
