Machined from billet 7075-T6 aluminum; Grip Module upgrade for the Sig Sauer OEM standard polymer P320 grip module; Culmination of all the best features of the A.C.E. 320 series; Enhanced Ergonomics (weight 8.72 oz); Flipped beaver tail for easy master grip acquisition; Proprietary wrap-around comfort/performance 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; Performance skeletonization; Elevated finger notch allowing for a more positive grip