Ruger LCP Magazines are chambered in 380 ACP. This magazine is intended as a replacement or additional magazine and has a capacity of 6 rounds. These LCP magazines are constructed of blued steel with reliable and durable internal parts and mechanics. Stop wasting time reloading your magazines at the range and buy an additional magazine for your Ruger LCP 380 ACP pistol. Factory original magazines are made to the same specifications that your original magazine was, so the function is equivalent to what yours was brand new.