This project gun build focuses on the PTR K3P, a 12-inch barreled G3K variant. Key modifications include upgrading the trigger pack housing and safety selector for better ergonomics, and installing an M-LOK rail. Critical technical adjustments involve replacing the stock 55-degree locking piece with a 50-degree one to prevent receiver damage, especially when suppressed, which can increase bolt velocity and cause 'roller dent'. Optic selection is also crucial, as wide optics can interfere with ejection.
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