What Determines the Caliber of an AR-15?

What Determines the Caliber of an AR-15?

What Determines the Caliber of an AR-15? The AR-15 was initially designed to be used specifically with a 5.56x45mm cartridge. However, due to its popularity, there is now a variety of calibers. But what determines the caliber of an AR-15 depends on what you are aiming...
Hornady SUB-X 300 190gr Subsonic Blackout Ammunition

Hornady SUB-X 300 190gr Subsonic Blackout Ammunition

SUB-X:  A Game Changer? Hornady has released their new Sub-X 190gr 300 Blackout ammunition and it is a game changer.  This is a direct challenge to the Lehigh Defense 194gr Maximum Expansion load.  One big difference is the price – the Hornady ammo is about half...