Direct impingement operating system with rotating locking bolt. Sixteen inch Nitride treated barrel with 1:7 inch rifling. 7075-T6 aircraft grade aluminum forged lower receiver. Two-piece aluminum quad rail. A2 type flash suppressor. "F" marked fixed front sight. AR-15 type aluminum magazine. Six-position collapsing stock.
| Manufacturer | Sig Sauer
|
| Model | RM400-16B-S
|
| UPC | 798681432677
|
| Caliber | 223 Rem
|
| Stock | 0
|
| State restrictions | CA CO CT DC DE HI IL MA MD NJ NY OR WA
|
| Availability | Out of stock |