Hey, you found it! The third variation of my Small Explosion Emitter Props! Congratulations!
Apparently this is only iClone 8.3+ compatible, though it was actually created in iClone 5 (it might still work in IC 5 if you download it and copy into your directory manually. Maybe not.)
Anyway, as usual, the particle emitters are all attached to a dummy prop alongside an AML script. The Script activates the explosion effect when you right click and Perform "Explode!"
Hope it works and blows up lots of small things!
iClone > Set > Props > Weapon Prop