The M400-TREAD V2 Direct is a complete, serialized lower receiver assembly designed for builders seeking a premium, drop-in-ready foundation for their AR-15 platform. It’s ideal for those who want to skip the assembly process and move directly to pairing with an upper receiver. Since we began stocking this unit in early 2024, it has consistently been a top choice for repeat customers building reliable, high-performance rifles.
Key Features
- Complete & Serialized Lower: Arrives fully assembled with trigger, grip, and stock. Ready for your upper receiver.
- Enhanced TREAD Design: Features the updated V2 ergonomics and flared magazine well for improved handling.
- 6-Position M4 Stock: Provides adjustable length of pull for a customized fit.
- Direct Compatibility: Built to Mil-Spec dimensions for reliable function with a wide range of AR-15 upper receivers.
- Durable Construction: Machined from 7075-T6 aluminum and finished with a hard-coat anodizing for long-term durability.
Specifications
| Model | M400-TREAD V2 Direct |
| Platform | AR-15 / Multi-Caliber |
| Fire Control Group | Installed Single-Stage Trigger |
| Stock | 6-Position M4 Style |
| Grip | Enhanced Polymer Grip |
| Magazine Compatibility | Standard AR-15 Magazines |
| Weight (measured) | 1.2 oz (Lower receiver assembly only) |
| Finish | Hard Coat Anodized Black |
Frequently Asked Questions
Is this a complete firearm?
No. The M400-TREAD V2 Direct is a complete, serialized lower receiver assembly. It is the regulated component of a firearm. To create a functioning rifle, it must be paired with a compatible upper receiver assembly, which is sold separately. All standard ATF procedures apply.
What upper receivers are compatible?
This lower is built to standard Mil-Spec dimensions, ensuring compatibility with the vast majority of AR-15 upper receivers on the market. It is designed to pair seamlessly with SIG Sauer TREAD uppers, as well as other quality manufacturers’ uppers.
Does it include a magazine?
No, the M400-TREAD V2 Direct does not include a magazine. It is compatible with any standard AR-15 pattern magazine. Our staff often notes that this lower pairs well with the extended slide release for faster reloads, which is an accessory you can add separately.
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