Aero Precision Apra600005C Mod 4 Handguard 10.6 Blk

The Aero Precision MOD 4 Handguard is a precision-engineered M-LOK rail built for shooters who demand a stiff, stable platform without compromise. This 10.6-inch AR-15 handguard is machined from 6061-T6 aluminum and designed to minimize deflection under load—a critical feature when running optics, lasers, or mounted accessories that need to stay zeroed. The steel barrel nut doesn't just secure the rail; it reduces point-of-impact shift when using infrared laser aiming devices under pressure, making it especially valuable for tactical and precision applications.

Installation is straightforward: the barrel nut requires no timing, and its lug pattern matches standard mil-spec castle nuts, so you won't need specialty tools or adapters. The handguard ships with the barrel nut and mounting hardware, and two anti-rotation set screws provide redundancy and a solid fit even on third-party upper receivers. At 14.78 ounces, the 10.6" length keeps weight low while maintaining the rigidity you need for consistent performance.

Customization is built in. A full-length, 7-sided M-LOK interface gives you unlimited options for mounting lights, vertical grips, bipods, or rail sections. The four steel-reinforced QD sockets are a telling detail—they're engineered to handle repeated attachment and removal of steel sling mounts without wearing out. Whether you're building a precision rifle, a duty gun, or a highly modular tactical platform, the MOD 4 delivers the engineering that separates Aero Precision from the rest.

Key Features

• 6061-T6 aluminum construction engineered for minimal deflection under load
• Steel barrel nut reduces point-of-impact shift with mounted lasers
• Full-length, 7-sided M-LOK interface for custom accessory mounting
• Four steel-reinforced QD sockets rated for repeated use
• No-timing barrel nut compatible with mil-spec castle nut wrenches
• Two anti-rotation set screws ensure secure fit on any mil-spec AR-15 upper
• Compatible with low-profile gas blocks

Specifications

Frequently Asked Questions

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

Yes. The MOD 4 is designed to match Aero Precision M4E1 Threaded Upper Receivers and PRO series components, and is fully compatible with mil-spec AR-15 upper receivers. The barrel nut has a mil-spec lug pattern and does not require timing, so installation is straightforward on any standard AR platform.

What comes in the box?

The handguard ships with the MOD 4 Handguard, the MOD 4 Barrel Nut, and MOD 4 Mounting Hardware.

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

Yes. The MOD 4 is designed to be compatible with low-profile gas blocks.

What accessories can I mount on the M-LOK slots?

The full-length, 7-sided M-LOK interface accepts any standard M-LOK accessories—lights, vertical grips, rail sections, bipods, and other tactical gear. The four steel-reinforced QD sockets also allow you to attach slings without wear or degradation over time.