Introducing the M4 PATROLMAN'S CARBINE FLAT TOP 16 w/Flip-Up Sight Upper Assembly, the ultimate firearm for patrol officers and tactical enthusiasts alike. This top-of-the-line rifle is designed to meet the most demanding requirements, with a 5.56 NATO (.223 REM) caliber that ensures powerful and accurate performance. Crafted with a 16'' barrel made of 4150 CMV material, this rifle boasts a salt bath nitride finish that enhances durability and longevity. The 1:7 twist rate provides superior accuracy, while the ? x 28 barrel thread pitch makes it easy to install a suppressor or muzzle brake. Weighing in at just 4.2 LBS, this rifle is easy to handle and maneuver, making it the ideal choice for those who need to move quickly in tight spaces. It features a carbine-length gas system and a 7075 Forged A4 Flat Top Upper Receiver, which provides a stable platform for mounting optics and other accessories. The M4 PATROLMAN'S CARBINE FLAT TOP 16 w/Flip-Up Sight Upper Assembly also comes equipped with a Midwest Industries Inc. Combat Rifle Rear Flip Sight, an F-Marked A2 Front Sight, an A2 Flash Hider, and a Mil-Spec Charging Handle. And with its premium building materials, you can count on reliable and consistent performance every time.