HM Defense HM15F556 Guardian F5 5.56x45mm NATO 30+1 16″ Chromoly Barrel w/Black Nitride Finish Mid-Length Gas System Anodized 7075-T6 Receivers M16 Bolt Carrier Group Mil-Spec HM CQB Stock & Standard Grip Includes 1 Magazine

The Guardian F5 rifle features an all HM match grade defense barrel. It also features a custom HM Defense 10 3/8 inch free float 1913 Picatinny rail that is compatible with the Magpul M-Lock mounting system. Some other components of the rifle include an M16 bolt carrier group with patented HMB bolt and mil-spec components including the trigger & fire control group charging handle and buffer tube/spring. Also a custom trigger guard CNC machined muzzle brake and steel gas block.