Known as the M18A3 and made to be an inert trainer from the start, solid turned alloy body, 7.25 inches in overall length. Made for safe training, loading and unloading of the 20mm Vulcan Gatling cannon. The 20mm M61 Vulcan Cannon has been in US military service for 50 years. Just this 1 available. Ships to the USA only, state laws may apply.

57MM RECOIL-LESS RIFLE PROJECTILE. INERT, NO FUSE. Approx. length 6.5″, Approx. width 2″

Shop online for Inert Shells and Dummy Rounds. Enjoy a large selection of military surplus products all made in the USA.

Made for safe training, loading and unloading of the 20mm AN-M2 aircraft cannons. These are WW2 era design and are likely post war production. Several available.

Lot of 5 linked Inert 20mm dummy M51A1 rounds. These rounds were used in cannons and auto-cannons as dummy rounds to simulate the size and weight of real ammunition. Makes a great door stop, collectible or conversation piece!

Enhance your collection with the precision-crafted (SAPHEI) Semi Armor Piercing High Explosive Incendiary 20mm Vulcan Inert Round. Meticulously designed for authenticity, these inert rounds are manufactured from real brass casings and inert SAPHEI projectiles, ensuring a true-to-life representation of military history.

Juse scored these solid aluminum 20 mm dummy round to use as a paperweight, a art project, or to hurl at your siblings when they act up! The HEADSTAMP reads Cartridge Drill 20 MM. M18A3. Each round is 7" long x 7/8" wide at the widest point.

Inert US drill round used in the Rheinmetall Mk 20 Rh-202, HS.820, and M139 in US service. This 20x139mm casing is made of steel and is in good condition. The Rheinmetall Mk20 Rh-202 is a 20mm autocannon designed and produced by Rheinmetall.

Inert and Safe for Display: This 20mm APDS-T round is completely inert, making it perfect for collectors, museums, or display without any risk of detonation. Authentic Tungsten Penetrator: The real tungsten penetrator showcases the armor-piercing capabilities that made this round effective in military operations.

This offering is for 1 of our inert US Military 20mm Projectiles. Like the ones pictured, all are in good looking condition. Each is 3 inches in length, solid construction likely for use in dummy rounds or training munitions. Not sure of the date but likely the 20mm Vulcan 1970-1980.