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Aero Precision
Overview
The Aero Precision M4a1 Clone Lower Receiver is a stripped lower designed for the AR-15 platform, ready for you to build your custom rifle. It is compatible with the 5.56 NATO caliber and features a trigger pin diameter of .154, making it a versatile choice for various trigger options. This lower receiver commonly appears in builds utilizing a mid-length gas system, providing a balanced shooting experience.
Specifications
Aero Precision M4A1 Clone Lower Receiver
Available Merchants(4)
Prices checked
Stock Alert
October 2026 so far on GunPartPicker
Aero Precision M4A1 Clone Lower Receiver ranks #59 of the 576 lower receivers builders have added on GunPartPicker so far in October 2026, behind the Ke Arms Ke-9 Billet Complete Lower Receiver W/ Trigger & Mag Catch 9mm, with about 1 in every 500 lower receivers added to builds. Down from #40 in September. Builds with this lower receiver are mostly chambered in 5.56 NATO (80%, then .223 Wylde 9%), split between mid-length (56%) and carbine-length (24%) gas systems, and nearly all AR-15.
It was out of stock everywhere we track for all of September 2026, and today none of the 4 retailers we track has it in stock right now. Listed prices start at $129.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by hundreds of builds that include this one
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Wilson Combat AR-15 Starburst Gunfighter Pistol Grip Black
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
Timber Creek Outdoors Ambidextrous Safety Selector - Black
Strike Industries Ambidextrous Magazine Release, Black - ARAMBIMRBK
CMMG AR-15 HD Pivot and Takedown Pin Parts KIT - 55AFF3B
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.
Builds Featuring This Part
See all builds →Builds in the community that include the Aero Precision M4a1 Clone Lower Receiver
| Build | Parts | Total |
|---|---|---|
 | 12 | $582.80 |
 | 12 | $999.18 |
 | 14 | $897.13 |
 | 22 | $2228.40 |
| 17 | $882.24 |
 | 12 | $3147.86 |
| 31 | $2784.92 |
| 26 | $1840.32 |
 | 14 | $2362.62 |
 | 27 | $2356.44 |
| 30 | $5368.94 |
| 20 | $977.89 |
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