Midwest Industries Scar Rail Extension Rail Black Features 2 QD Sling Swivel Points And One Continuous Bottom Rail For Accessories Mounting FN Scar Mi-S1617 Model: Scar Rai Finish/Color: Black Accessories: Features 2 QD Sling Swivel Points And One Continuous Bottom Rail For Accessories Mounting Fit: FN Scar Type: Rail Manufacturer: Midwest Industries Model: Scar Rai Mfg Number: Mi-S1617