AERO AR15 STANDARD LOWER PARTS KIT

Building a custom AR15 from scratch? The Aero AR15 Standard Lower Parts Kit gives you every small component you need to complete a stripped lower receiver and get your rifle running. Whether you're assembling your first AR or your tenth, this mil-spec kit ensures all the pins, springs, and fire control parts interface correctly with your lower—no hunting for odd bits or discovering compatibility surprises halfway through the build.

Aero's mil-spec dimensions and coating maintain the exacting standards that keep your AR functioning reliably across thousands of rounds. The kit includes the full complement of fire control components (hammer, trigger, disconnector, and their springs), takedown and pivot hardware, bolt catch assembly, safety selector, magazine catch, trigger guard, and A2 pistol grip. Everything you need is in the box—just add your stripped lower and upper receiver.

This is honest gunsmithing gear for builders who want quality parts without the markup of buying components one at a time. Aero's reputation in the AR community is built on exactly this kind of straightforward, no-nonsense approach: solid engineering, mil-spec spec sheets, and parts that work.

Key Features

• Complete lower parts kit—no missing components
• Mil-spec dimensions ensure correct fit and interface
• Includes hammer, trigger, disconnector, and all springs
• Full takedown and pivot pin hardware
• Bolt catch assembly and magazine catch body
• Safety selector, trigger guard, and A2 pistol grip
• Professional coating for durability

Specifications

Frequently Asked Questions

What do I need besides this kit to complete an AR15 build?

You'll need a stripped lower receiver and a complete upper receiver. This kit provides all the small parts and fire control components for the lower—the stripped lower itself is your foundation, and the upper (barrel, bolt carrier group, handguard, and so on) completes the rifle.

Is this kit compatible with standard AR15 lowers?

Yes. This is a mil-spec standard lower parts kit designed to work with mil-spec AR15 stripped lowers. The mil-spec dimensions ensure correct interface with any standard lower receiver.

What's included in the fire control group?

The kit includes the hammer, trigger, disconnector, and their springs, plus the trigger guard. It also includes the takedown and pivot pin springs and detents, bolt catch assembly, safety selector assembly, magazine catch body with spring and button, A2 pistol grip with hardware, and a 4-40 set screw for threaded takedown pin detent holes.

Can I use this for a first-time AR build?

Absolutely. This is a complete lower parts kit—everything you need is included. Pair it with a stripped lower receiver and upper receiver, and you have all the pieces for a working rifle. If you're new to AR building, take your time, reference a good assembly guide, and don't force anything; these parts are engineered to fit together smoothly.