When you're looking for Maxim Defense ingenuity in a standard AR-15 package, the MD-15 is your answer. The MD-15 was engineered to fit the growing demand for reliable, accurate and affordable AR15 style rifles for today's Law Enforcement Patrol Officers. For increased comfort and versatility, every MD-15 features their free-floating Slimline handguard. These handguards provide a monolithic-like upper receiver platform and M-Slot compatibility.