The main pocket compatible for Handgun Modles:
The Compact Bag fits: (bodyguard or sub-compact and micro-size handguns)
Such as: Glock 42, 43 & 43X- with & without Crimson Trace LG443 Glock 26, 19, 17, 34- any others that are the same size Ruger P95DC Springfield Hellcat
The Standard Bag fits: (full-size and compact-size handguns)
Such as: All double stacks Glock 21, 20 and same size models Ruger P95DC S&W 640
The Expanded Bag fits the handgun bigger than double stacks Glock 21..etc