Lot - A 3 MK7 50cal brass shell casing.

Milsurp calibers : r/ammo

Wwii Us Trench Art Ashtray Brass Casing Usmc 1

Is it possible to make a 50 caliber sub machine gun? - Quora

3 inch / 50 Cal. — USS SLATER

3 inch 50 cal. Artillery Shell – Annapolis Maritime Antiques

US Navy 4 50 cal Common Round, Complete - FIREARMS - U.S. Militaria Forum

Item Relisted! FS WW2 3/ 50 Caliber MK7 Dated 7-1945 BRASS SHELL CASING

Mk7 MOD-2 3inch Artillery round - General Ammunition Discussion - International Ammunition Association Web Forum

SHELL CASINGS – Artillery Works Co

USA 3/50 (7.62 cm) Marks 27, 33 and 34 - NavWeaps

Original WWII Era U.S. Navy Gun 3 Inch / 50 Caliber Dual Purpose Naval – International Military Antiques