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.
Brand HM Defense
Category Tactical Rifles
Caliber 5.56x45mm NATO
Model Guardian
Series F5
Stock Finish Black
Action Semi-Auto
Sights None, Optic Ready
Capacity 30+1
Muzzle Muzzle Brake
Magazine Type OEM
Grips Black Polymer
Hand Right
Handguards 10.37" M-LOK Free-Float
Includes 1 30-Rd Magazine
Rails Picatinny
Receiver Finish Black Anodized
Receiver Material 7075-T6 Aluminum
Stock Description Mil-Spec HM
Stock Finish Group Black
Stock Material Synthetic
Trigger Mil-Spec
Twist 1:7"
Barrel Description 4150 Chrome Moly
Barrel Finish Black Nitride
Barrel Length 16"
Caliber Dictionary
The Below Information Has Been Provided From Our Gun Caliber Dictionary And Is Meant For Informational Purposes Only. It Is Not Intended to Describe The Unique Specifications For This Ammunition.
The 5.56X45mm NATO cartridge was designed by James Sullivan, a member of Eugene Stoner's engineering team that developed both the M16 rifle and its original cartridge. The 5.56X45mm NATO was adopted by the U.S. military in 1964 and by NATO in 1980. With bullet diameter of .224-inch, the original M193 military cartridge used a 55-grain bullet at 3250 fps; the current M855A1 cartridge, developed by FN, uses a 62.5-grain bullet at 3020 fps, offering greater range and better penetration. The civilian version of the 5.56X45mm is 223 Remington; the cartridges are dimensionally identical but military chamber dimensions and specifications for military brass are different. It is considered safe to use 223 Remington ammo in a 5.56X45MM NATO chamber, but not a good idea to use 5.56X45mm ammo in a rifle specifically chambered for the 223 Remington. Although the stopping power of .22-caliber bullets remains controversial the 5.56X45mm has served well in now multiple generations of M16 rifles. — Craig Boddington
