M85 Carrying Case, photo via Pritzker Institute
The M85 carrying case is a component of the M183 Charge Assembly, a satchel charge used by demo guys ranging from Army engineers to Navy SEALs to destroy obstacles. The M85 case can hold 20 pounds of C-4, enough to destroy a single three-foot-high by three-foot-wide concrete dragon’s tooth obstacle.
What gets crammed inside to turn the M85 case into the M183 is 16 M112 block demolition charges and four priming assemblies. The whole thing is a blast at parties and great to prank your friends with. 
Without that, the M85 is just a sack.
