paint ball barrel

grabcad

Rewriting the given text, we have "paintball gun barrel." Alternatively, it could be phrased as "barrel for paintball gun" or simply "barrel used in paintball games." A different approach could be to say "the tube that holds paint in a paintball weapon." Regardless of how you rephrase it, the main idea is that we are discussing the barrel component specifically designed for use with a paintball gun.