This review details a modified Kel-Tec CP33, dubbed the 'Redneck MP7,' featuring a brace, RMR optic, and suppressor. The build highlights the effectiveness of CCI Clean-22 .22 LR ammunition for suppressor longevity. It also provides a crucial tutorial on loading the quad-stack magazine to prevent rim-lock, emphasizing the need for precise technique and regular maintenance for optimal reliability.
This AR-22 "meltdown" test pushed a CMMG upper with a KGmade Swarm suppressor to its limits using Federal Auto Match ammo. Despite reaching high temperatures (barrel 334°F, suppressor 304°F) after nearly 2,200 rounds, the primary failures were due to carbon and lead fouling, not thermal breakdown. A thorough cleaning restored full reliability, demonstrating that .22 LR fouling, not heat, is the limiting factor for sustained full-auto fire in this platform.
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