The ST50 is a conversion kit for the Kel-Tec P50, transforming it into a unique platform. It allows for the installation of an AR-style grip and trigger group, features a forced reset trigger for semi-automatic fire, and includes a 1913 rail for braces or stocks and a threaded barrel for suppressors. The kit utilizes coupled P90 magazines, offering a high capacity of 5.7mm rounds, though the ammunition cost is noted as significant.
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