The M400 TREAD features a free-floating M-LOK enhanced handguard that is lightweight yet rigid for extreme control and ease of mounting accessories such as lights and handstops. The lower receiver has an ambidextrous safety for right or left-handed operation and includes an integrated QD mount for easy sling attachment. The M400 TREAD features a stainless steel barrel offering durability and corrosion resistance while improving accuracy; 3-prong flash hider; 1:8 twist rate; mid-length gas system; SIG Matchlite 2-stage trigger; MAGPUL SL-K telescoping stock for easy adjustment and a customized fit.
| Trigger | Two-Stage Matchlite Duo |
| FireArm | yes |
| Muzzle | 3 Prong Flash Hider |
| Capacity | 30+1 |
| Action | Semi-Auto |
| OAL | 32.50" |
| Barrel Description | Stainless Steel |
| Weight Range | 6 lbs to 6.99 lbs |
| Caliber | 5.56 NATO |
| Weight | 6.50 lbs |
| Hand | Ambidextrous |
| Sights | None |
| Stock Finish Group | Black |
| Metal Finish Group | Blued/Black |
| Twist | 1:8" |
| Stock Description | Magpul SL-K |
| Barrel Length | 16" |
| Receiver Material | Aluminum |
| Barrel Length Range | 16" to 16.99" |
