Introducing the new 50 cal GI Milsim Nano50 paintball gun. The G.I. Nano 50 is the smallest and lightest tournament marker available. The Nano is a spool valve marker with unsurpassed firing rate and accuracy, while both quiet and soft on paint. Hoseless grip intergrated streamlined design help shave ounces off the weight. Click on any paintball gun listed below to read the new features and specifications of the next generation in paintball...50cal.