Original U.S. WWII M21 Inert Practice Pineapple Fragmentation Training Hand Grenade with Early Cutback M10 Fuze and Original Correct Husk - Dated 1939 Snider Rifle The inside of the barrel

The inside of the barrel is great too

The helmet originally would have had chainmail covering the neck

The sliding keeper loop is unfortunately missing

1918 in Callaway

Original U.S. WWII M21 Inert Practice Pineapple Fragmentation Training Hand Grenade with Early Cutback M10 Fuze and Original Correct Husk - Dated 1939 Snider Rifle The inside of the barrelOriginal Item: Only One Available. Totally inert according to BATF guidelines with a hollow body and inert fuse. This is a great example of the M21 Practice Training grenade, an inert version of the iconic U. S. fragmentation pineapple grenade issued during WWII. The Mk II was standardized in 1920 replacing the Mk I of 1917. It was phased out gradually, the U. S. Navy being the last users, and on 2 April 1945 the Mk II and Mk IIA1 were re designated