Hunting rifles are tailored to meet the specific needs of each application. However, the MSR offers unlimited configuration possibilities with one rifle. Upper receivers with different chamberings and barrels can be field changed in minutes. Hand guards, pistol grips and rear stocks can be adapted for hunting everything from varmints, to deer, to feralhogs. FEATURES: 450 Bushmaster caliber; 16" barrel carbine with 1 in 24" twist; Upper and lower receivers machined from a Mil-Spec aluminum forging; Free-floating, vented aluminum fore-end; Includes 5-round single stack magazine.