Took my newish G17 second series to the range for the first time today and shot off 325 rounds without any failures of any kind whatsoever. Shooting at 25 meters the gun was shooting to the left and a tad too low however. At 10 yards it was hard to keep a nice group together and it still shot to the left and a bit lower than the point of aim. Most of my shooting was Wallyworld Winchester 100 round 115 gr FMJ stuff with a box of Rem. 124gr Golden Sabres also. I'm not a big fan of the stock Glock sights so, what's the consensus on better than average aftermarket sights for Glocks? Is there an available adjustable rear sight that's any good? Thanks.