I could have purchased the right screws, but chose instead the MacGyver route by taking a hacksaw to the oversized screws. The only issue I had was that the RMR, which had previously been set atop an AR-type mount, came with screws that were too long for the Glock adapter plate. I installed a Trijicon RMR for review, which took about two minutes total. Installation instructions are helpful and to the point, perfect for guys like me who barely read them anyway. The G40 Gen4 MOS comes with a cover plate installed, as well as a package containing four brand-specific adapter plates and a hex wrench. Four interchangeable backstraps provide increased comfort and ergonomics. Fifteen-round Glock magazines provide extra durability and reliability, as well as plenty of follow-up shots for thick-skinned hogs or charging bears. Paired with a quality reflex sight, the Glock-standard, 5.5-pound trigger makes for reasonably good accuracy, as does the 6.02-inch barrel. of energy at the muzzle, which in turn translates to rather fierce recoil. A Norma factory-loaded 170-grain JHP (jacketed hollow point) travels at 1,340 fps with 680 ft.-lbs. The 10mm Auto was introduced in 1983 in the Bren Ten semi-auto pistol, which was based on the CZ-75 (see page 50). Jeff Cooper, of Gunsite fame, who sought to make the ideal combat weapon and cartridge. The 10mm Auto was developed largely by Col. For hunting, however, the 10mm Auto with reflex sight is an extremely formidable option. Sure, it’d fit in a shoulder holster under a jacket or next to the bed, but realistically, a 40.14-ounce (loaded) handgun that’s 9.49 inches long is probably not going to be the first defensive handgun choice for most shooters. Practically speaking, the G40 Gen4 is more readily applicable to hunting than to self defense, simply because of its size. It also permits the shooter to keep both eyes open even when shooting at distance-a huge advantage in defensive and hunting situations because it allows the shooter to process and respond to everything that’s happening in the field of view. This simplifies and speeds up target acquisition and allows shooters to stay focused on the target the whole time. Unlike traditional iron sights, which require shooters to focus on the front sight while aligning it with the rear sight and an out-of-focus target, a reflex sight allows you to focus on the target and a single red dot of varying size or brightness on the same focal plane. While many product introductions in the firearms industry represent solutions to problems that never existed, this one makes perfect sense. The wedding between the G40 Gen4 in 10mm Auto and the MOS is ideal because it unites a powerful semi-auto made for hunting with a reflex-ready configuration, thus extending the range and effective accuracy of the gun. The other advantage of the MOS is that it comes optic-ready right out of the box, and the process of installing the correct plate is accomplished in minutes. The G40 Gen 4 MOS retails for $840, which compared to the cost of an aftermarket slide or custom gunsmithing is relatively inexpensive. The beauty of the MOS configuration is a combination of simplicity and monetary savings. The G40 Gen4 (10mm Auto) featured in this review is the slight exception and comes with wider adapter plates to accommodate the increased width of the G40 slide. In addition to the preinstalled cover plate, each MOS variant handgun comes with four plates to match common configurations: EoTech/Docter/Insight/Meopta Trijicon RMR C-More and Leupold Delta Point. The MOS, which is currently available on the Gen4 versions of the G34, G35, G40 and G41, is an adaptable plate system that comes factory-built into the slide and allows shooters to mount popular reflex sights to their handgun without aftermarket machining or a custom slide. The other main introduction was the Modular Optic System (MOS), which demonstrates how quick and easy it is to get a reflex sight on a handgun. The big splash this summer was the release of the long-awaited G43, a single-stack 9mm that’s been flying off gun store shelves. PHOTOS BY ALEX LANDEEN Glock’s G40 Gen4 MOS proves that adding a reflex sight to a high-capacity, high-power handgun doesn’t have to be a costly, cumbersome ordeal.Ĭats typically get all the credit for their quick reflexes, but lately it’s been Glock that’s shown a snappy response to the ever-burgeoning demands of the consumer.
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