This guide details the installation of the Lage MAX-11/15 upper receiver, a modification that transforms a Mac-11 or Mac-10 pistol into a rifle-style firearm. Expert Ian McCollum emphasizes the importance of adhering to ATF regulations to ensure the firearm remains compliant. The process involves attaching the upper receiver to a registered machine gun lower, ensuring proper function, and confirming it cannot be fired independently.
This expert-level guide details the operation of the factory semi-automatic SIG MKPO, drawing on the authoritative insights of a firearms instructor. It covers the unique tilting bolt system, the spring-loaded magazine retention, and the critical receiver end cap safety feature, emphasizing safe handling and understanding of its complex mechanics.
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