Machined from billet 7075 aluminum; Grip Module upgrade for the Sig Sauer OEM standard polymer P20 grip module; Designed to be compatible with the OEM Sig X-Compact 15 round mag; Complimenting finger notches for both primary and support hands; A.C.E. skeletonized trigger guard featuring strategically placed serrations; Enhanced Ergonomics (weight 6.375oz); Modified beaver tail to reduce muzzle flip; Monolithic design featuring ultimate rigidity providing excellent recoil mitigation; Strategic "blind" skeletonized weight reducing cuts for conceal carry comfort; Narrowly sculpted upper portion of grip handle for comfort & easy access to controls