I produced the model impact crater shown below with a combination of the same granular materials I use for tectonic models and a projectile fired from a powerful air rifle (a city-safe version of Gene Shoemaker’s approach at 17:00 in this link). Because these models rely on material properties to produce the central peaks, the introduction of too much colored sand into the microbead zone will prevent peak formation. Shooting a mechanically homogenous (all sand or all microbeads) material with the same impactor at the same velocity produces a crater with no central peak.