American Tactical Milsport 5.56 18" AR15 Rifle. This AR-15 rifle features an 18" heavy barrel for increased accuracy and durabilty. The 13" MLOK handguard has enough room for all of your tactical accessories as does the top picatinny rail. These make great places for your optics or grips. Other features include an adjustable buttstock, A2 style polymer pistol grip and flash hider. This AR platform makes for a great home defense or sporting rifle at an affordable price. Grab one today. ATI Milsport 5.56 AR15 18" Rifle - ATI Milsport AR15 18" 5.56 Rifle - ATIG15MS55618ML13