The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Advertisement" category. These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. ![]() I attribute the maintaining of zero to the tight fit of the Holosun 509T to the CHPWS plate. This induces very slight rotational wobble in the optic, but it is secure enough to keep rounds on a B8 repair center at 25 yards in this condition. The plate itself is firmly attached to the slide, with no signs of loosening. Despite repeat tightening, the screw continues to loosen by 1/4 turn after roughly 50 rounds. The greatest movement of the retention screw was 1/4 turn, then staying firm from there. Cut LooseĪround the 2,700 round mark my Holosun 509T began loosening from the plate. The remaining ~3,600 rounds were using the factory barrel. This includes the 50x NATO rounds and 6x +P Gold Dot rounds. Roughly 175 rounds of the above were fired using a KKM match grade barrel and their matching four port compensator. Round Count and Class TimeĪs of this review, I have fired 3,838 through my Glock 19 using the C&H Precision plate and Holosun 509T combo. I am able to use my Ameriglo GL-429 iron sights with this C&H Precision plate, which likely would not have been possible with a stock MOS plate. As the Holosun 509T is a taller optic, this can sometimes be problematic. This also helps with compatibility with varying heights of backup iron sights. These measures help with your bore offset at varying distances, along with very slightly reducing felt recoil. Additionally, this slightly reduces height over bore, along with lowering the center of gravity for the optic. This ensures the plate stays secure to the slide under far more punishing conditions than what OEM offerings can endure. Thanks to the stronger, yet thinner construction of this plate, users get far more thread engagement into the slide than with traditional MOS plates. I surely wouldn’t regret greater security, but I may regret forgoing it later down the road. While this second smattering of thread locker isn’t required or even often recommended, it’s extra peace of mind for me. For added measure, I threw some more Vibratite VC3 on the 509T’s screw as well. After throwing some of the included Vibratite VC3 on the screws, I mounted the plate to my Glock 19 and my Holosun 509T to the plate. I picked up my CHPWS MOS plate in January 2021. The screws provided by C&H Precision for mounting the plate to the slide, and optic to the plate are stainless steel. ![]() Thickness is kept consistent between 0.095 to 0.099 inches. The plates themselves are made from 6061 aluminum, with black anodizing. C&H plates are significantly slimmer and made of superior materials. But 7075 aluminum isn’t going to end the world.One of the big stand-outs of the C&H Precision plates compared to factory MOS plates is the construction. 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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