Aero Precision Apra600001C Mod 4 Handguard 15" Blk

The Aero Precision MOD 4 Handguard 15" is a precision-engineered rail system built for AR-15 shooters who demand accuracy and durability without compromise. Machined from 6061-T6 aluminum, this full-length handguard prioritizes stiffness to minimize deflection under load—a critical factor if you're running optics, lasers, or multiple accessories that need to stay zeroed. The 15-inch length gives you plenty of real estate for mounting gear while maintaining a balanced profile on mid-to-large format builds.

What sets the MOD 4 apart is its thoughtful engineering: a steel barrel nut eliminates the need for timing during installation, and the lug pattern is compatible with standard mil-spec castle nuts, so you won't need specialty tools. Four steel-reinforced QD sockets are built to handle repeated attachment cycles without loosening or deforming, and the full-length 7-sided M-LOK mounting surface lets you configure optics, lights, grips, and slings exactly where you want them. Two anti-rotation set screws provide extra security and tighter fitment, especially useful if you're working with third-party upper receivers.

This handguard ships with the MOD 4 barrel nut and mounting hardware, and it's designed to integrate seamlessly with Aero's M4E1 Threaded Upper Receivers and PRO series components. It's also compatible with any mil-spec AR-15 upper receiver, making it a versatile choice whether you're building a new rifle or upgrading an existing platform.

Key Features

• 6061-T6 aluminum construction for stiffness and reduced optical deflection
• Steel barrel nut with standard mil-spec lug pattern—no timing or special tools required
• Full-length 7-sided M-LOK interface for unlimited accessory mounting
• Four steel-reinforced QD sockets rated for heavy-duty sling use
• Two anti-rotation set screws for secure, wobble-free installation
• Low-profile gas block compatible
• Includes barrel nut and mounting hardware

Specifications

Frequently Asked Questions

Is the MOD 4 Handguard compatible with my AR-15 upper receiver?

Yes. The MOD 4 is designed to work with Aero Precision's M4E1 Threaded Upper Receivers and PRO series components, and it's also compatible with any mil-spec AR-15 upper receiver. The steel barrel nut uses a standard mil-spec castle nut lug pattern, so no specialty tools are needed for installation.

What's included in the box?

The handguard comes with the MOD 4 barrel nut and mounting hardware. You'll have everything needed for installation on a compatible upper receiver.

Can I use this handguard with a low-profile gas block?

Yes, the MOD 4 is compatible with low-profile gas blocks.

Does the MOD 4 handguard reduce point-of-impact shift?

The steel barrel nut and rigid 6061-T6 aluminum construction are engineered to minimize deflection and point-of-impact shift under load, which is especially important if you're running optics or infrared laser devices.