Aero M16A4 Clone Complete Lower

The Aero Precision M16A4 Clone Complete Lower is a fully assembled lower receiver purpose-built for builders who want an authentic, retro-correct M16A4 platform without having to source and assemble individual parts. If you're after the classic look, controls, and ergonomics of the military M16A4 but want to build it to your own spec, this complete lower gives you a functional starting point with all the furniture, trigger group, and controls already installed. It's Gen 2 Aero Precision manufacture, which means you get refinements like the upper tensioning screw and expanded magwell that the original milspec design didn't have—modern quality in a period-correct package.

The lower ships with a standard A2 stock, A2 grip, and safety selector marked for Safe/Semi/Burst operation, plus all internal parts and the receiver extension already in place. The receiver itself carries proper M16A4 markings: the Property of U.S.A. and CAL. 5.56MM designations, along with Aero Precision's branding. This authenticity matters if you're building a rifle that looks and feels like the real steel, not a modern reinterpretation. You'll still need a compatible upper receiver to complete the build.

The Gen 2 features deserve a mention: the upper tension screw lets you dial in how tight your upper and lower fit together, so you can match any standard AR15 upper to this lower with a solid, rattle-free connection. The flared magwell makes magazine changes faster and smoother, a practical upgrade that doesn't break the retro aesthetic. It's a no-nonsense foundation for an M16A4 clone that respects what the original was while not refusing modern conveniences.

Key Features

• Complete lower receiver — all trigger group, safety, stock, and grip hardware pre-installed and ready to pair with an upper
• Authentic M16A4 markings and controls, including Safe/Semi/Burst selector
• Gen 2 upper tension screw for precise upper-to-lower fit adjustment
• Flared magwell for reliable and faster magazine insertion
• Standard A2 stock and A2 grip included
• Chambered in 5.56mm

Specifications

Frequently Asked Questions

What uppers will work with this lower?

Any standard AR15 upper receiver will fit this lower. The Gen 2 upper tension screw lets you dial in the fit for a tight connection.

Is this a complete rifle or just the lower?

This is a complete lower receiver only. You'll need to source and attach a compatible AR15 upper receiver to build a complete rifle.

What comes installed on this lower?

The lower ships fully assembled with the trigger group, safety selector, buffer tube, stock, grip, and all internal components ready to go. You simply need an upper receiver and barrel assembly to finish the build.

Does this have the original M16A4 burst fire mechanism?

The safety selector is marked for Safe/Semi/Burst, matching M16A4 markings. For legal compliance, your final rifle configuration must comply with all federal and state firearms laws where you are located.