The Colt(R) M4 Carbine Magpul SL is a semi auto rifle chambered in 5.56 NATO. It features a 16.1-inch barrel. This configuration offers a 30+1 capacity and a Matte Black/Flat Dark Earth finish.Key FeaturesCaliber: 5.56 NATO.Action: Semi Auto.Barrel Length: 16.1 inches.Capacity: 30+1.Barrel: Steel; Chrome Lined; 1:7 Twist.Finish: Matte Black/Flat Dark Earth.Sights: Adjustable Sights.Includes: One 30-Round Magazine.Colt(R) is one of the most established names in the firearms industry known for producing firearms associated with long standing American manufacturing practical performance and recognizable design heritage. The brand is widely recognized for combining proven firearm platforms with modern production standards quality materials and broad appeal across sporting defensive and collector markets. Colt(R) firearms remain well regarded by shooters who value reliability craftsmanship and enduring brand legacy.