Our Xisico Sentry Magazine Models... We wanted to help out the folks with the discontinued Xisico Sentry rifle by providing some Big Air Sentry magazines. The OEM mags were prone to breakage and once they're broken, no new ones are available. The Big Air Sentry mags are larger capacity and still fit under medium rings! The Big Air Sentry mags are available in 22cal-12shot & 25cal-10shot. The mags are easy to load, chamber perfectly and provide great accuracy to this older platform.