Menger VoidThe 2nd iteration fo the Menger Sponge turned into a puzzle.
Mercedes CubeA 3x3x3 with unusually cut circles which can be turned independently.
Mercedes Cube IIIt looks very similar to the Mercedes Cube I but this combines cornerturns with turns of the circles.
Mess Cube 4An Eastsheen 4x4x4 modified to look like a 5x5x5 it internally is. The internal bandaging was removed and replaced by an external one.
Meta IvyAn Ivy Cube with a custom impressionistic design.
Micro 24-CubeAlso known as "Little Chop" but with an edge length of just 30 mm.
Missing Edge VoidA Void Cube with one edge removed. It works like a bandaged Void Cube.
Modular CubeA Skewb 3x3x3 that was redesigned and bandaged. Implements PSL(3,2)
Monkey-Cat cubeA simple hybrid combining two symmetrical cuts of corner turning hexahedron with three copter cuts.
Multi-24-CubeThe concept of the Multi-Puzzles applied to a 24 cube.
Multi-2x2x2+SkewbCould be viewed as a shape variant of the Super Z if there weren't the inner pieces resembling the Master Skewb.