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Mfg Item #: RM400-16B-TRD
| Brand | Sig Sauer |
| Caliber | 5.56x45mm NATO |
| Model | M400 |
| Series | Tread |
| Stock Finish | Black |
| Action | Semi-Auto |
| Barrel Length Range | 16" to 16.99" |
| Sights | None, Optic Ready |
| Capacity | 30+1 |
| Magazine Type | AR-15 |
| Grips | Black Polymer |
| Handguards | M-LOK |
| OAL | 30.80" |
| Receiver Finish | Black Hard Coat Anodized |
| Receiver Material | 7075-T6 Aluminum |
| Safety | Manual Thumb |
| Stock Description | 6 Position Magpul SL-K |
| Stock Finish Group | Black |
| Stock Material | Synthetic |
| Thread Pattern | 1 / 2"-28 tpi |
| Trigger | Single-Stage |
| Twist | 1:8" |
| Weight | 7 lbs |
| Barrel Description | Stainless Steel Free-Floating |
| Barrel Finish | Black |
| Barrel Length | 16" |