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AeroPrecision
The Aero Precision 11.4 Mod 4 handguard is a precision-engineered free-float rail built for AR-15 rifles that demand accuracy and modularity without compromise. At 11.4 inches, it strikes a balance between handiness and mounting real estate—ideal for mid-length builds, tactical setups, and shooters who want enough M-LOK interface to attach optics, lights, and accessories without excess rail weight. Machined from 6061-T6 aluminum, the MOD 4 minimizes point-of-impact shift and deflection under load, making it a solid choice for both range work and field use.
What sets the MOD 4 apart is attention to real-world durability. The steel barrel nut seats without timing, so installation is straightforward and doesn't require specialty tools. The lug pattern matches mil-spec castle nuts, keeping your build compatible with standard AR-15 components. Four steel-reinforced QD sockets resist wear from repeated sling attachment, and two anti-rotation set screws keep the handguard locked in place on mil-spec and Aero M4E1 upper receivers alike. The full-length seven-sided M-LOK surface gives you flexibility to set up your rifle your way.
An 1.2-inch internal diameter accommodates low-profile gas blocks, so you're not limited to oversized front sight blocks if you're running a short-stroke or adjustable piston system. You get the handguard, barrel nut, and mounting hardware in the box—everything needed to install and go to work.
| Platform | AR-15 |
| Length | 11.4 inches (measured end to end) |
| Weight | 15.06 oz |
| Material | 6061-T6 aluminum |
| Attachment Type | M-LOK |
| Internal Diameter | 1.2 inches |
| QD Sockets | 4 (steel-reinforced) |
| Barrel Nut Torque | 55±5 in-lbs |
| Includes | MOD 4 handguard, barrel nut, mounting hardware |
The MOD 4 is designed to match seamlessly with Aero Precision M4E1 Threaded Upper Receivers and the PRO series. It is also compatible with mil-spec AR-15 upper receivers.
Yes. The 1.2-inch internal diameter is compatible with low-profile gas blocks, so you have flexibility in your gas system choice.
No. The barrel nut lug pattern matches mil-spec castle nuts, so you can install it with standard AR-15 tools. The design eliminates the need for timing, making installation straightforward.
You receive the MOD 4 handguard, the MOD 4 barrel nut, and mounting hardware. Two anti-rotation set screws are included to secure the handguard on your upper receiver.
AeroPrecision
The Aero Precision 11.4 Mod 4 handguard is a precision-engineered free-float rail built for AR-15 rifles that demand accuracy and modularity without compromise. At 11.4 inches, it strikes a balance between handiness and mounting real estate—ideal for mid-length builds, tactical setups, and shooters who want enough M-LOK interface to attach optics, lights, and accessories without excess rail weight. Machined from 6061-T6 aluminum, the MOD 4 minimizes point-of-impact shift and deflection under load, making it a solid choice for both range work and field use.
What sets the MOD 4 apart is attention to real-world durability. The steel barrel nut seats without timing, so installation is straightforward and doesn't require specialty tools. The lug pattern matches mil-spec castle nuts, keeping your build compatible with standard AR-15 components. Four steel-reinforced QD sockets resist wear from repeated sling attachment, and two anti-rotation set screws keep the handguard locked in place on mil-spec and Aero M4E1 upper receivers alike. The full-length seven-sided M-LOK surface gives you flexibility to set up your rifle your way.
An 1.2-inch internal diameter accommodates low-profile gas blocks, so you're not limited to oversized front sight blocks if you're running a short-stroke or adjustable piston system. You get the handguard, barrel nut, and mounting hardware in the box—everything needed to install and go to work.
| Platform | AR-15 |
| Length | 11.4 inches (measured end to end) |
| Weight | 15.06 oz |
| Material | 6061-T6 aluminum |
| Attachment Type | M-LOK |
| Internal Diameter | 1.2 inches |
| QD Sockets | 4 (steel-reinforced) |
| Barrel Nut Torque | 55±5 in-lbs |
| Includes | MOD 4 handguard, barrel nut, mounting hardware |
The MOD 4 is designed to match seamlessly with Aero Precision M4E1 Threaded Upper Receivers and the PRO series. It is also compatible with mil-spec AR-15 upper receivers.
Yes. The 1.2-inch internal diameter is compatible with low-profile gas blocks, so you have flexibility in your gas system choice.
No. The barrel nut lug pattern matches mil-spec castle nuts, so you can install it with standard AR-15 tools. The design eliminates the need for timing, making installation straightforward.
You receive the MOD 4 handguard, the MOD 4 barrel nut, and mounting hardware. Two anti-rotation set screws are included to secure the handguard on your upper receiver.
