SIG SAUER P320 Compact 9mm/.40 AUTO/.357 SIG Grip Module Black Large GRIP-MOD-C-943-LG-BLK. 40 AUTO or .357SIG with a medium grip size. Requires the 9mm .40 AUTO .357SIG slide and barrel. Specifications for SIG SAUER P320 Compact 9mm/.40 AUTO/.357 SIG...