Machined from billet 7075 aluminum; Grip Module upgrade for the Sig Sauer OEM standard polymer P320 grip module; Flipped beaver tail for easy master grip acquisition; Upgraded Gen2 more aggressive proprietary wrap-around grip texture with strategic horizonal indexing points; Complimenting finger notches for both primary and support hands; Monolithic design featuring an asymmetrically flared mag well and integrated proprietary grip texture; Slim upper portion of grip handle; Elevated finger notch allowing for a more positive grip; Designed for flush fit with the 4.7" barrel/slide Sig P320 platform; Full length mill spec 1913 picatinny rail