The Aero Precision MOD 4 Handguard (brand part number APRA600005C) is a Minimal Optical Deflection handguard machined from 6061-T6 aluminum for AR-15 builds that need to hold zero on a mounted laser or optic under load. Aero Precision engineers the MOD 4 with a focus on stiffness, drastically cutting deflection compared to a standard clamp-on or slip-on handguard, and it attaches to the upper receiver through a steel barrel nut rather than an aluminum one. That steel barrel nut is a deliberate design choice: it significantly reduces point-of-impact shift when running an infrared laser aiming device under recoil, which matters most for night-vision-enabled or duty-oriented builds. The result blends robust construction with an ergonomic form factor without the usual trade-off between rigidity and weight.

Key Specifications

• Machined from 6061-T6 aluminum for a stiff, low-deflection build.
• Attaches via a steel barrel nut rather than an aluminum one.
• Engineered to minimize point-of-impact shift when running an infrared laser aiming device under load.
• Uses the M-LOK accessory mounting system.
• Measures approximately 10.6 inches in length.
• Built for the AR-15 platform.

Frequently Asked Questions

Why does this handguard use a steel barrel nut instead of aluminum? The steel barrel nut significantly reduces point-of-impact shift when running an infrared laser aiming device under load, which matters most on duty or night-vision-enabled builds.

What accessory mounting system does this handguard use? M-LOK.

Buy the Aero Precision MOD 4 Handguard

Hold your zero under load with a purpose-engineered, low-deflection handguard. Order the MOD 4 from our Aero Precision lineup of AR handguards, and our Lubbock, Texas team will get it ready to ship as soon as it’s available.