This Sig Sauer P320 Compact Large Grip Module is a genuine factory replacement part finished in a standard black polymer. It is designed to house P320 or P250 Fire Control Units in 9mm, .40 S & W, or .357 SIG that do not require a manual safety cutout. The "Large" circumference provides a fuller, more substantial grip profile specifically for shooters with larger hands who require more surface area for control. This assembly is intended for use with compact or carry-length slides and includes a pre-installed, reversible magazine catch for immediate use. Sig Sauer P320 9/40/357 Compact Large Black Pistol Grip Module Assembly GRIP-MOD-C-943-LG-BLK