![]() Temperatures ranged from high 90's to low 40's Fahrenheit during the testing period, and the C&H Precision V4 Defender retained zero through it all, without need for adjustment. Holsters like the Tier 1 Concealment Agis retained the pistol at such an angle that the optic would occasionally bump up against waist-height objects, but kept it away from being continually stressed against the body. We were interested to see if the point of aim would shift over days of continual wear, and dry fire. The on-the-range testing needed to span over a season, and necessarily include consistent every-day-carry wear and tear. Enter some quote about water gently flowing over time eventually turning a small stream into a formidable river, and you get the point. The types of stress such plates endure cannot and should not be replicated in a day. When it comes to duty and personal protection, after installation, extra time at the range to confirm proper fitment is necessary, not optional. Early ConcernsĮven when torqued to spec, and the screw depth is balanced across the platform, the polymer construction allows a very small amount of flex. Also, the inclusion of a sacrificial shroud adds value to any user: daily carry to heavy use. By gaining deeper screw depth, and replacing the oft-cracking OEM plate with a more enduring option, trust in a mounted optic is restored. From the box containing not only replacement screws, but thread-locker, and installation bits, to the addition of a sacrificial window frame to protect expensive glass, C&H Precision produced something more reliable than Glock. No more problems manifested from that point.Įach of the smaller details add to the value of the V4 Defender plate. Re-adjusting and balancing each of the screws created a tighter, and more even fit across the whole plate. A re-evaluation of each of the mounting screws showed the problem clearly: user error. After about a half-hour of various drills, draws, and racking the slide off the shroud in 85 degrees Fahrenheit, only once did the various flexing cause the battery to disconnect and the dot to disappear. The first 100 rounds on the range held zero without a problem. Fitment onto the G19 was tight, clean, and without complications, gaps, or bends. Upgrades like this tend to be more black-and-white in their evaluation: either they function or they don’t. The longer the plate is in use, the more confidence it brings. The sacrificial shroud on the C&H stood out as a minimal bulk with maximum benefit. Upon hearing of a replacement option, there was no question, we had to try it. However, even after sighting in the RMR, it did not leave a complete sense of confidence. After a little bit of tinkering, and a not recommended attempt to straightening the slight bend, a somewhat satisfactory installation was achieved. The first installation of an RMR using the parts that shipped with the pistol left a small gap between the rear of the plate and the slide. Enter the C&H Precision V4 Defender plate: a polymer replacement with added benefits. ![]() During installation, the OEM plate itself showed a little warping, and to our dismay, had a record of snapping under the stress of firing the handgun. The Gen 5 G19 brought with it noticeable upgrades, but the easily bent layer of cast metal expected to secure a red-dot of choice was not one of them. Many of us, however, scratched our heads when we sorted through the mounting plates that came with the handgun. When GLOCK released their MOS line, it appeared like a natural evolution for the name famous in reliability. But 7075 aluminum isn’t going to end the world.Mounting a red-dot on an Optics-Ready pistol should be hassle free, and most of the time it is, as long as one pays attention to detail. Would I be happier if they used ordnance grade steel? Yes. We do everything Cowan did for our T&E process, and in our initial RDS certification training, short of the drop testing (we just took his word for it on that one). We have dozens of officers running CHPWS plates for Glock and Sig for a couple years and have zero documented failures with CHPWS plates. The CHPWS is more than durable enough for the RMR and Holosun. ![]() But the DPP is unreliable hot garbage anyway and I won’t ever carry one, so for me it’s irrelevant. This also adds to the elimination of the sheering issue for that optic. Additionally, the fit for the V4 is so tight with the RMR has to be forced into place due to the exacting tolerances. This eliminates the sheering issue for those optics. The RMR and Holosuns don’t have that problem because the screws go all the way into the plate through those sleeves. ![]() That’s also an issue with the Leupold DPP having a high housing that prevents the mounting screws from actually going into the plate. ![]()
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