The Stag Arms Stag 15 M4 is a popular model of the AR-15 platform rifle manufactured by Stag Arms. The Stag 15 M4 is designed to replicate the classic M4 carbine used by the U.S. military and is a versatile and reliable option for various shooting applications. The Stag 15 M4 is chambered in 5.56x45mm NATO, which is one of the most common calibers for AR-15 rifles. This chambering allows for compatibility with a wide range of ammunition. The Stag 15 M4 comes with traditional M4-style furniture, including a collapsible stock, an A2 pistol grip, and a standard M4 handguard. The collapsible stock allows for easy adjustment of the rifle's length-of-pull to accommodate different shooters and shooting positions. The Stag 15 M4 features a 16-inch barrel, which is the same length as the military-issued M4 carbine. The barrel is often made from chrome-moly steel and may have a government profile, providing a good balance between weight and performance. The Stag 15 M4 might include a mil-spec trigger group, a removable carry handle with adjustable rear sights, and a forward assist, which are common features found on many AR-15 rifles.