Complex sentence: The K14 is a bolt-action rifle with a bolt handle that opens at 60 degrees for fast reloading; prototype models had rough bolt movement and triggers, but they were smoothed out in production examples.
Split into simpler sentences: The K14 is a bolt-action rifle with a bolt handle that opens at 60 degrees for fast reloading. Prototype models had rough bolt movement and triggers, but they were smoothed out in production examples.