(GunReports.com) -- One of the most popular handguns for law-enforcement personnel is the Glock Model G22. The G22 is a full-size handgun that fires from a 4.49-inch barrel. Since the introduction of the Glock pistol, there have been only subtle changes, and most people still think of the Glock as being available without options or variation. But we've been able to purchase different models with upgrades to the trigger, sights, slide release, magazine release, and other operational components. Also, at http://www.teamglock.com, we found another lineup of RTF pistols that offer streamlined grips with a radical surface texture—but the Gen 4 Glock pistols go even further. They offer an aggressive grip texture and a choice of three different backstrap profiles. The Gen 4 pistols include the 9mm G17 and G19, the .357 SIG G31, and the 45 GAP G37.When we began putting these guns through their paces, we first wondered how bullet weight might affect accuracy. The most popular and readily available 40 S&W rounds are topped with 155-, 165-, and 180-grain bullets. The 155-grain JHP bullet is rapidly gaining popularity with law enforcement. This round was represented by Black Hills Ammunition. Next, we chose two Winchester USAicon rounds, one topped with 165-grain FMJ bullets and the other driving 180-grain JHP slugs.

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