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I contacted M*Carbo after watching a YouTube video of their products I was interested in. I purchased their trigger spring kit for my S&W SD9VE. The installation was very doable after watching their how-to video. I also ordered the Stainless guide rod, spring and take down pin for my Ruger LCP II .22LR. The products are very high quality, and their customer service and fast shipping are second to none.
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- Steven Moths