The CX4 is my second tactical-type rifle. I purchased the CX4 STORM (PX4) 9MM/17RD model. It has quickly become my favorite firearm. An outstanding rifle with futuristic styling, it is compact, lightweight and very accurate even without optics. It’s also a simple design that facilitates disassembly and fast/easy cleaning. The CX4 is an all-around outstanding rifle. I'm really glad I bought it.