The Gen. 4 grip is a big improvement over the privious. I use a Hogue grip sleeve on the Gen. 3 which worded out very well and others I have suggested it to who did not like the Gen. 3 grip. Unforunately the Hogue Universal Grip Sleeve will not work well on the Gen. 4. The improved trigger, mag release, grip, and other improvements are such that I can easily and happily live with it.
NRA Benefactor Life Member, Life Member NSSA, NSCA, NAHC, DAV