Just compare the size of the batteries, that should help in deciding. The CT grips use two CR 2032 batteries. I have had CT grips on my M&P9C for the past 5 years, have never had to re-zero them and I remove them every time I clean the gun. I change the batteries every six months, even though they are still working fine. Never had a problem with it fitting in any of my holsters, including my daily carry Crossbreed Super Tuck. Plus, the customer service provided by Crimson Trace is first class.
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