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The M4E1 PRO is the top of Aero Precision's lower receiver lineup, and it earns that spot by taking everything builders already love about the M4E1 and adding true ambidextrous controls. Machined from a solid 7075-T6 forging, this stripped lower integrates mirrored bolt catch and magazine release controls directly into the receiver, so you can run the gun comfortably from either side without shifting your dominant hand off the grip. The proprietary ambi components come pre-installed from the factory, so you're not fighting tiny parts during your build.
This receiver keeps all the smart touches that made the standard M4E1 a builder favorite. You get an integrated trigger guard that eliminates the fragile tabs found on mil-spec lowers, a flared magwell that helps guide magazines in for faster reloads, and an upper tension screw that lets you dial out any slop between the upper and lower for a tighter fit. The threaded bolt catch pin and threaded takedown pin detent recess make assembly far less frustrating, no launching detents across the garage.
Even with its enhanced features, the M4E1 PRO stays compatible with standard AR15 components and magazines, so you can configure it however you want using mil-spec parts you already trust. The Kodiak Brown anodized finish gives it a distinct earthy look that pairs nicely with FDE, bronze, or green furniture, and it stands apart from the sea of black lowers out there. Note that colored anodized finishes carry their own character and can vary slightly in tone, which is part of the appeal for builders wanting something different.
Since this is a stripped version, you'll still need a lower parts kit, an ambidextrous safety selector, and a buffer tube assembly to finish the build. For left-handed users or anyone who wants genuine two-sided control on their next AR15, this lower is a standout starting point that's built in America and backed by Aero's reputation for tight tolerances.
Yes, that's really the whole point of the PRO model. The bolt catch and magazine release controls are mirrored on both sides of the receiver and come pre-installed, so southpaws get full control without any aftermarket add-ons. Right-handed users benefit too, since the right-side bolt release can be indexed easily with the trigger finger for administrative handling.
No, this stripped version ships with the ambidextrous bolt catch and magazine release pre-installed, but the ambi safety selector is sold separately. You'll want to add Aero's PRO ambidextrous safety selector along with a lower parts kit and buffer tube assembly to complete the build.
It does. The M4E1 PRO is compatible with standard mil-spec AR15 components and magazines, so you can build it out with parts from most manufacturers. It also includes an upper tension screw that lets you tighten up the fit between your upper and lower if there's any minor play.
Beyond the ambidextrous controls, the M4E1 PRO has an integrated trigger guard, a flared magwell for quicker reloads, a threaded bolt catch pin, and a threaded takedown pin detent recess that make assembly easier. It's machined from a solid 7075-T6 forging, giving you a billet-style look and feel in a stronger, forged package.
| UPC | 840014623266 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | APAR600032AC |
| Caliber/Gauge | Multi |
| Color | Kodiak Brown |
| Length | 10.1000 |
| Product Type | Semi-Complete |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| Style | Stripped |
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