This list is not just a Top 5 list, but it is a scientifically proven Top 5 list. Watch the video of the Top 5 Scientifically Best Sub-Compact 9mms by The Firearm Blog... "In this episode of TFBTV, James tells you which guns are SCIENTIFICALLY PROVEN to be the best subcompact 9mm handguns on the market. Kind of. James walks you through some formulas he came up with to find what carry nines are the most efficient in terms of how many rounds they carry in relation to their size and weight. James gives you the top 5 most efficient doublestack subcompact 9mms, and then covers the most efficient 6, 7, and 8 rounds single stack 9mms."