The Mk23 Model O 45 ACP the USN uses has a service life of 30K rounds for the barrel w +P ammo, an additional 30K on the slide/frame.
The USN pegs the M9 at 5K, the M1911A1 at 15K BTW.
All three will go much farther.
For example, the Beretta locking blocks are avgng over 15K, the frames 35K, slides over 70K.
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