Fusion Firearms all light-weight Aluminum construction, CNC machined from Bar-Stock, MagWell base for the 2011/infinity/Grand Sport style wide-body pistols and clones. Greatly increases mag well opening and reloading speed. Minimum bulk, conforms to IPSC height requirements. Drop-on installation, fits to frame with no modifications and secured with extra length mainspring housing retainer pin supplied with Magwell. Black color finished, Made in the USA. . For staggered mag/hi-cap frames only.