SIG SAUER M400 TREAD Snake Bite Rifle RM40016BTRDSB — Description

The SIG SAUER M400 TREAD Snake Bite RM40016BTRDSB is a premium .223 Remington / 5.56 NATO semi-automatic rifle featuring the distinctive Snakebite Flat Dark Earth (FDE) finish and upgraded components from SIG Sauer’s TREAD series. Designed as a modern sporting rifle, the Snake Bite combines the proven M400 direct-gas operating system with enhanced ergonomics, Magpul furniture, and a free-floating M-LOK handguard.

The rifle features a 16.5-inch barrel, Magpul SL-K FDE adjustable stock, and a lightweight aluminum receiver platform. The M400 TREAD system is built around a mid-length gas system, rotary bolt design, and AR-15 pattern controls, providing a familiar and adaptable platform for recreational shooting, training, and general-purpose applications.

Finished in the exclusive Snakebite FDE color scheme, this model adds a distinctive appearance while maintaining the modularity of the TREAD family. The free-floating M-LOK handguard allows attachment of compatible accessories, while the rifle’s 1:8 twist barrel supports a broad range of .223 Remington and 5.56 NATO loads.

SIG SAUER M400 TREAD Snake Bite RM40016BTRDSB — Specifications

Manufacturer: SIG SAUER
Model: M400 TREAD Snake Bite
Model Number: RM40016BTRDSB
Caliber: .223 Remington / 5.56 NATO
Action: Semi-automatic
Operating System: Direct gas impingement with rotating bolt
Platform: AR-15 style rifle

Barrel Length: 16.5 inches
Barrel Twist Rate: 1:8″
Barrel Type: SIG precision barrel
Receiver Material: Aluminum
Finish: Snakebite Flat Dark Earth (FDE) finish
Handguard: Free-floating M-LOK handguard
Stock: Magpul SL-K 6-position telescoping stock (FDE)
Magazine Type: AR-15 / STANAG compatible magazine
Magazine Capacity: 30 rounds
Trigger: Single-stage factory trigger
Muzzle Thread: 1/2×28 TPI
Overall Length: Approx. 31–34 inches (stock position dependent)
Weight: Approx. 7 lbs (configuration dependent)

Key Features

• Snake Bite Special Edition FDE finish
• .223 Remington / 5.56 NATO chambering
• 16.5-inch barrel
• Magpul SL-K FDE adjustable stock
• Free-floating M-LOK handguard
• Mid-length gas system
• 1:8 twist barrel for ammunition versatility
• Lightweight aluminum receiver set
• AR-15 magazine compatibility
• 30-round magazine included
• Optics-ready Picatinny top rail
• SIG Sauer TREAD modular accessory compatibility
• Ambidextrous controls
• Reliable M400 platform design

Package typically includes:

• SIG SAUER M400 TREAD Snake Bite rifle
• 30-round magazine
• Magpul SL-K FDE stock
• Free-floating M-LOK handguard
• Owner’s manual and safety documentation