Complex sentence: Most figures average approximately 3.5 inches tall, with oversized "mega" figures and vehicles, and feature a wide variety of spring-loaded action features such as projectile launchers and swinging close combat parts.
Split into simpler sentences: Most figures average approximately 3.5 inches tall with other larger sized "mega" figures and vehicles. The figures sport a wide variety of spring-loaded action features such as projectile launchers and swinging close combat parts.