I have been looking for examples of these grenades for years and suddenly all 4 fall into my lap within a 2 week period from two separate sources. I would go out and buy a lottery ticket but I spent all my slush fund money on rifle grenades......
left to right:
British No.27 WP Combination Hand and Rifle Grenade. 80,000 of these were purchased in 1918 for use by the AEF
M9A2 Anti-Tank Rifle Grenade
Energa T-41 adopted by US as the M28 HEAT Rifle Grenade
M31 HEAT Rifle Grenade. Real de-watted HEAT round and not a converted practice round.