Aero Precision M4E1 Built Lower Receiver with Magpul STR Stock
This Aero Precision M4E1 built lower is an AR-15 pattern lower receiver assembly, ready to pair with a compatible upper. The M4E1 profile features an enhanced, flared magwell and an integrated trigger guard.
This lower includes a smooth (non-notched) pistol-style / non-adjustable buffer tube, and includes a Magpul STR adjustable stock (shown separately/uninstalled in photos). This lower also includes an installed pistol grip and installed lower controls.