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It is a 70 series, and drop safe. S&W uses a heavier firing pin spring.

neither it uses a swartz type firing system "One of the distinct S&W safety components is the Swartz firing-pin, operated by the grip safety. The Swartz type safeties are firing pin safeties that are unlocked by depressing the grip safety. Currently, the S&W 1911s and Kimber series II guns have Swartz safeties."