This is an awesome add on for my Beretta M9 Commercial (http://www.berettausa.com/products/m9-commercial-9mm-15rds/). Installation was not difficult, simply followed the instruction and it went all well. I tested the two 2032 batteries that came with with SE Battery Tester, they were both at fully charged. Extremely satisfied with it, now my M9 is more perfect than ever.
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