Midwest Industries Combat Rail M-LOK, Fits Ruger PC Carbine, 12 Long, Black MI-CRPC9 The Midwest Industries Combat Rail Series Handguard is a 1-piece design that features M-LOK accessory mounting slots on 8 flats along its length and two QD sling swivel mounting points. This robust design has a slim profile and is machined from rugged 6061 aluminum with a type 3 hard coat anodized finish. This 12" long rail is compatible with the Ruger PC Carbine. Midwest Industries is a proven leader in the firearm industry. Made in the USA" focusing on the small details to make your rifle platform better.