This video details the break-in process for the Zenith ZF5-P, an MP5-style firearm. The host demonstrates initial tightness, the recommended 500-round break-in with 124-grain ammo, and tests 115-grain rounds. After approximately 250 rounds, the ZF5-P significantly smooths out, becoming reliable and easy to operate, comparable to other high-quality MP5 clones.
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