Complex sentence: The F1 was followed by the G1 that included several minor improvements such as redesigned grips, and an enlarged trigger guard for utilization with gloves, but it remained conceptual and was never actually produced.
Split into simpler sentences: The F1 was followed by the G1 version that included several minor improvements, such as redesigned grips and an enlarged trigger guard for operation with gloves. However, the G1 remained conceptual and was never actually produced.