Sig Sauer SigTac P320 P250 Grip Module Assembly - GRIP-MOD-C-943-LG-BLK The Perfect fit for your Full-Size, Carry, Compact, or Subcompact Frame P320 or P250. Small, Medium, and Large for Full-size, Carry, and Compact Pistol Sizes. Small and Medium with rail for Subcompact Size.