The SIG Sauer P320 X-Series TXG Grip Module is a factory X-Change upgrade that transforms your P320 full-size into a heavier, more controllable platform without sacrificing the modularity the P320 is known for. Molded from a tungsten-infused polymer, the TXG module adds internal mass for softer perceived recoil and steadier follow-up shots, while the integrated flared magwell and medium-profile grip improve reloads and purchase. Finished in Legion Gray and shipped with the internal grip weight installed, this module accepts the P320 fire control unit and is intended for the newer-style 17-round and 21-round X-Series magazines, making it a straightforward, OEM-engineered route to competition-ready ergonomics and balance. Sig Sauer P365 Low Cap Grip Module Assy P320 9mm TXG Full Size Medium Grip Weight Funnel Gry X-Change Kit 8900039