The Bushmasters QRC II is the perfect rifle for anyone looking for reliability accuracy and ease of use. Built to the highest standards this rifle is perfect for the range the field or for home defense. The Bushmasters QRC II features a caliber of 5.56 NATO (.223REM) and a carbine length gas system. The 16" 4150 CMV Salt Bath Nitride Pencil Barrel with a 1:7 Twist Rate and 1/2x28 Thread Pitch provides both accuracy and power. The rifle's Salt Bath Nitride MPI Bolt Carrier Group ensures that the rifle will fire reliably time after time. The Bushmasters QRC II also features a 7075 Forged A4 Flattop Upper Receiver a 7075 Forged Xm15-E2S Lower Receiver and an overall length of 32.5-36. It weighs just 5.8 LBS W/O Magazine making it easy to carry and maneuver. The Bushmaster 14 Free Float Rail ensures that you can add your favorite accessories and the Bushmaster M4 Carbine Stock provides stability and comfort. The Bushmaster Aluminum Magazine ensures that you always have plenty of rounds on hand. The rifle also features an A2 Pistol Grip an A2 Birdcage Flash Hider and a Milspec Trigger. The Bushmasters QRC II is the perfect rifle for anyone looking for a reliable accurate and easy-to-use firearm. Whether you're at the range or in the field this rifle is sure to impress.