Crossline-C serie is 9×19 caliber. C serie is semi automatic pistol. Our senior engineers always make innovations, with the highest technology and R&D, brought patented light recoil system on C serie. C serie is strong enough for all heavy duties because of its metal upper and lower. C serie has 2 type of butt stock, first one is telescopic and adjustable butt stock in 8 diffirent positions. Second one is metal foldable butt stock. These both butt stocks serve shooters variety shooting positions. C serie has 2 diffirent magazine release buttons on both under trigger guard and right side of the receiver to change magazine easier and faster.