Quote:
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Delayed blowback action pistols like the P9s tend to cycle somewhat forcefully due to high breech pressures when opening.This rams the slide up hard against the return spring to the extent that normal slide stops will be battered and frames cracked prematurely.
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Pressures from the 9mm round are generally much higher than the .45 round, yet the 9mm models don'tuse recoil buffers.
I wonder if the buffer is there for other reasons?