Resists heat, dirt and rust. You can abuse it, drop it, even throw it in the mud if you want and it will clean up and still deliver jam-free function. This Mag is dent resistant and self lubricating and perfect for your Mini-14 Made in the USA. Fits a Ruger Mini-14 Resists heat, dirt and rust Jam-free function Dent-resistant Self-lubricating 30 rounds Made in the USA