These five.45x39mm cartridges function clear-burning Berdan primers, Full Metallic Jacket (FMJ) projectiles, and cost-saving metal casings which are coated with a lightweight film of polymer. The polymer coating shields the metal circumstances from rust although in storage but in addition serves as being a buffer involving casings and chamber partitions; https://tacticalrounds.com/product-tag/wot-trigger-review/