Aero Precision M4E1 Lower Parts Kit W/ Moe Sl Grip - Blk

The Aero Precision M4E1 Lower Parts Kit with MOE SL Grip in black gives you all the internal components you need to finish an Aero M4E1 lower receiver or any mil-spec lower build. This kit bundles a quality Magpul MOE SL grip with a complete fire control group and all the pins, springs, detents, and catches required for a functional AR platform rifle. If you're building a precision rifle, hunting AR, or defensive carbine on an Aero lower, this kit handles the fiddly internal work so you can focus on barrel, bolt, and optics.

The included Magpul MOE SL grip is a slim, ergonomic option that works well whether you run the rifle right- or left-handed, and the mil-spec fire control group components give you reliable, predictable function. Everything ships ready to install—no hunting through parts bins or waiting on backorders for a single missing spring. Note that this kit does not include a trigger guard, since the M4E1 lower receiver integrates one as part of its machining.

Whether you're assembling your first AR or your fifth, having a matched kit of quality components takes the guesswork out of spec compatibility. Aero's parts are manufactured to mil-spec tolerances and are known for fit and durability in the field and at the range.

Key Features

• Magpul MOE SL grip in black for comfortable, consistent hand position
• Complete mil-spec fire control group—hammer, trigger, disconnector, springs, and detents included
• All takedown, pivot, and bolt catch pins, springs, and detents
• Magazine catch assembly and buffer retainer with springs
• Safety selector with spring and detent
• Includes 4-40 set screw for threaded takedown pin detent hole
• Designed for Aero M4E1 lower receivers and standard mil-spec lowers

Specifications

Frequently Asked Questions

Will this lower parts kit work on any AR lower receiver?

This kit is designed for the Aero Precision M4E1 lower receiver and is compatible with standard mil-spec lower receivers. Verify that your lower follows mil-spec dimensions and drilling before purchasing.

Is a trigger guard included in this kit?

No. The trigger guard is not included because the M4E1 lower receiver has a trigger guard integrated into its design. If you use this kit on a different mil-spec lower that requires a separate trigger guard, you will need to purchase one separately.

What type of fire control group is in this kit?

This kit includes a mil-spec fire control group with a standard hammer, trigger, disconnector, and all related springs and detents. It provides reliable, predictable function for hunting, target shooting, and general use.

What's included in the kit?

The kit includes the Magpul MOE SL grip, fire control group components (hammer, trigger, disconnector, springs, detents), takedown and pivot pins with springs and detents, bolt catch assembly with pin and spring, magazine catch body and button with spring, buffer retainer with spring, safety selector with spring and detent, trigger and hammer pins, and a 4-40 set screw for the threaded takedown pin detent hole.