The muzzle is tapered like the Gen 5s and there are forward slide serrations also. The rounds are a true single stack the magazine and mag well are slightly wider to accommodate. The new magazine, slightly wider and longer, holds 10 rounds and includes the orange follower (and round count indicator) of Gen 5 fame. Holding the original model next to the new silver slimline, I did not notice many changes dimensionally until I reached the grip, which appeared to be just under a half inch longer. The G43X takes that evolution even further. The PoliceOne team will visit the Sands Expo Center in Las Vegas to bring you the newest in firearms and tactical gear.