This famous small grenade was developed and constructed in The Netherlands, but never made it into the Dutch army.It was in use with the US army and others.Length : 58mm Diameter : 40mmTotal weigth : 140gram Filling : 36gram Comp. B
The two scan below show the original factory folder for the V40grenade ánd its launcher-attachment.
The photo on the right shows the practice V40 fitted to the rifle grenade adapter as shown in the factory folder above.Photo © Cory.
And another type of adapter, I think US made.Photo © Siegfreid.