The Colt M4 Carbine OEM2 is a customizable firearm based on the proven Colt M4 Platform. With a Low Profile Gas Block and no Handguard Retaining Ring, it allows for the use of aftermarket free float handguards. This high-quality rifle is perfect for consumers and dealers looking to build or offer customized options. Please note that it is restricted in California, Connecticut, Massachusetts, Maryland, New Jersey, and New York. Suitable for M4 Carbine Series and Rifles categories.