The Beretta M9A4 features the proven design of the M9 series with new modern features that include a red-dot optic compatible slide a beveled magazine well and texturized Vertec-style thin grips for instinctive control and a more natural fit for all shooters. - Caliber: 9mm - Action: Single/Double - Barrel length (in): 5.1 - Grip Width: 1.3 - Magazine Capacity: 18 - Overall height (in): 5.4 - Overall length (in): 8.7 - Overall width (in): 1.5 - Sight radius (in): 6.3 - Weight unloaded (OZ): 33.4