PRODUCT DESCRIPTION PRODUCT SPECIFICATIONS FN15 CARBINE 5.56MM 16" M-LOK Manufacturer: FN Model: FN 15 Carbine M-Lok Color: Collapsible / Folding Stock A2 Buttstock Finish: Matte Black Action: Semi-Auto Rate of Twist: 1-in-7" Thread Pattern: 1/2x28 UPC: 845737013103 Capacity: 30 + 1 Barrel Length: 16" Caliber: 223 Rem | 5.56 NATO