Sig x-series grip module - SIG SAUER 9/40/357 P320 X-Five Grip Module

Excellent upgrade to a standard P320; provides better balance to the firearm, at least for me. It allow better recovery back on target, especially under rapid fire. However, one thing to keep in mind, this grip module doesn't work with older standard mags, they won't lock up properly with or without the mag-well. Have some extended mags, and they work perfectly, which is what I wanted, so didn't look into the issue further.