This video explores the South African Army's .22 rimfire conversion kit for the R4 rifle, designed to facilitate cheaper and simpler troop training. Developed by Willie Klotz for Thor Engineering, the system utilizes an open-bolt firing mechanism and ingeniously employs the Galil/AK fire control system's sear for firing. The description highlights the kit's complex installation process, often requiring custom fitting to individual rifles, underscoring its unique and practical application in military training.
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