Vintage WWII 1944 20mm Mk 4 Inert Dummy Drill Round Anti-Aircraft Navy Shell For Sale

Up for sale is an original, authentic World War II 20mm Mk 4 inert dummy drill training round, explicitly headstamped with the production date 1944 on the base. These heavy-caliber ordinance cartridges were utilized extensively by the US Navy and Allied forces to safely train anti-aircraft deck gunners and loaders on maritime warships without the risk of handling live ammunition.The base features the original military stamped markings identifying it as a 1944 20MM MK 4 ordnance piece. It features a solid metal practice projectile securely crimped into a heavy brass casing. Designed with a clear, factory-drilled circular hole through the lower third of the body, this item provides an immediate visual indicator that it contains zero active powder or primers, making it 100% legally inert, empty, and permanently safe for collectors. It makes a fantastic historical conversation piece, shelf accent, or paperweight display for WWII militaria history buffs.Condition Details:Good authentic military surplus condition. It features a heavy, beautifully aged dark patina on the brass casing and visible surface rust, pitting, and oxidation on the steel projectile tip, proving its historical age. The "1944 20MM MK 4" headstamp remains legible on the bottom face. The piece is solid, structurally sound, and completely empty/deactivated. Please review all photos for the exact cosmetic details.Type: Military Inert Training Dummy / Drill RoundCaliber: 20mm Oerlikon (20x110mm RB)Headstamp Date: 1944Model Designation: Mk 4Safety Status: 100% Permanently Deactivated / Inert / Empty