Sig Sauer GRIPMODXF943LGCOY P320 Grip Module X-Series (Large Size Module), 9mm Luger/40 S&W/357 Sig, Coyote Polymer, Fits Full Size Sig P320 (4.70") (Magwell & Weight Compatible) Install Your P320 Firing Control Unit Into This Grip Module Assembly To Convert To a P320 X-Series Full Size, chambered In 9mm, .357 Sig, .40Auto. Requires The 9mm, .357 Sig And .40Auto Slide And Barrel.*Please Note- This Grip Module Does Not Include The Extended Magwell And Internal Weight.- The X-Series Grip Modules Will Not Work With magazines That Have "Sig Sauer" On The Baseplate. They Are Compatible With The baseplates That Have The Sig Mark On It. Gun Model: P320 Frame Finish: Coyote Tan Frame Material: Polymer Gun Type: Pistol