Home / NFA - Short Barrel Rifle / SIG SAUER MCX RATTLER LT 5.56 SBR 7.75″ Sale! SIG SAUER MCX RATTLER LT 5.56 SBR 7.75″$2,94999 Original price was: $2,94999.$2,79981Current price is: $2,79981. In stock SIG SAUER MCX RATTLER LT 5.56 SBR 7.75" quantity Add to cart SKU: RMCX-556N-7B-LT-SBR Category: NFA - Short Barrel Rifle Product ID: 102730 Description Description M-LOK Aluminum HandguardFully Ambidextrous Controls Related products POF USA PHOENIX SBR 9MM 8″ BLK MLOK $1,80100 Sale! Q SW SHORTY SBR 5.56 13″ $1,79900 Original price was: $1,79900.$1,71623Current price is: $1,71623. Sale! POF USA RENEGADE+ DI SBR 556 10.5″ BLK $2,08300 Original price was: $2,08300.$1,90670Current price is: $1,90670. Sale! SIG SAUER MCX SPEAR-LT SBR 7.62X39 11.5 $2,72999 Original price was: $2,72999.$2,59253Current price is: $2,59253.