For the Gen 3 17, 22 etc. there is no better laser for the large handed person than the LG-617. I always found my 17 grip a little thin though I do wear an XL glove. It adds just the right amount of girth and changes the grip angle to more 1911ish. It also allows for a really high tight grip without the slide pinch some folks get. It does take up space on the right hand slide serrations but easy to get used to.