This Sig Sauer P320 X-Series Compact Grip Module is a premium factory upgrade finished in a black polymer for Fire Control Units without a manual safety. It features the signature X-Series ergonomics, including a deep trigger guard undercut and an extended beavertail, which allow for a higher grip and improved recoil management. The "Small" circumference frame provides a slimmer profile for better control and easier trigger reach while remaining optimized for 9mm, .40 S & W, and .357 SIG setups with 3.6-inch or 3.9-inch slide lengths. This assembly comes ready for installation with a pre-installed, reversible magazine catch and is compatible with internal tungsten weights for added balance. Sig Sauer P320 X-Series 9/40/357 Compact Small Black Pistol Grip Module Assembly GRIP-MODX-C-943-SM-BLK