tem # MTB – The Mini Thunder Bugle has all the same great features of the original Thunder Bugle. What makes this call so versatile is the collapsible grunt tube that extends to 28″ and collapses down to a handy size of 10″. This call uses the same RT-Reeds as the original Thunder Bugle. No camo cover included with the Mini Thunder Bugle. The Mini Thunder Bugle everything is the same as the Thunder Bugle except for the grunt tube. Some Hunters like this call because it’s very easy to carry.