The M400-TREAD V2 is a lightweight, durable handguard designed for the SIG Sauer M400 rifle platform. It provides a modern, ergonomic mounting surface for accessories while maintaining a slim profile. Ideal for builders and owners seeking a robust upgrade without significant added weight. Since we began carrying it in summer 2025, it has consistently been a top seller and a regular reorder item for our shop.
Key Features
- Lightweight aluminum construction for minimal added weight.
- Full-length M-LOK attachment slots on all four sides for maximum accessory flexibility.
- Designed specifically for drop-in compatibility with the SIG M400 platform.
- Enhanced heat dissipation and a comfortable, textured grip surface.
- Includes all necessary mounting hardware for a straightforward installation.
Specifications
| Model | M400-TREAD V2 |
| Compatibility | SIG Sauer M400 |
| Material | 6061-T6 Aluminum |
| Attachment System | M-LOK |
| Length | 15 inches |
| Weight (measured) | 4.3 oz |
| Finish | Matte Black Anodized |
| Included | Handguard, Barrel Nut, Mounting Hardware |
Frequently Asked Questions
Does this require any gunsmithing or special tools to install?
No. The M400-TREAD V2 is designed as a drop-in replacement using the standard SIG barrel nut. Installation can be completed with basic armorer’s tools.
How does the weight affect handling?
At 4.3 ounces, the added weight is minimal. Our staff notes, “The weight is barely noticeable once installed. Under an ounce of added carry weight,” making it an excellent choice for maintaining a balanced rifle.
Is this compatible with other AR-15 platforms?
This handguard is engineered specifically for the SIG Sauer M400 platform and its proprietary barrel nut system. It is not a universal fit for standard mil-spec AR-15 uppers.
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