B&T APC9-SD - The Swiss MP5-SD
This guide details the disassembly process to inspect the unique ported barrel system of the B&T APC9-SD. The video, presented by an established firearms expert, demonstrates how the ported barrel works in conjunction with the integral suppressor to reduce supersonic 9mm rounds to subsonic velocities, effectively mitigating the sonic crack. The expert also touches on magazine reliability and the firearm's internal mechanics.










