Re-introducing the Integrated Blowhole System (IBS). This updated release combines the time tested ZPS. 1 slide integrated with the Blowhole Compensator allowing you to manage that unruly gas. Adding an angled port and back-bored barrel pushes more gas up and out reducing carbon buildup in the slide. Gain the flat shooting features of the compensated setup without the threaded barrel. We bring the high quality performance demanded with an easy drop-in barrel upgrade.