The .300 HAM’R was developed by Wilson Combat as an improvement over the .300 Blackout for the AR-15 platform. Introduced in 2018, it offers increased velocity, range, and terminal performance, making it more suitable for hunting and mid-range shooting. The .300 HAM’R provides larger, .30 caliber ballistics in a more compact package that fits within AR-15 magazines.
The .300 HAM’R is primarily chambered in AR-15 platforms with custom-built upper receivers. Wilson Combat produces a variety of firearms and components tailored to this cartridge, providing hunters and sport shooters with options for customization. One can essentially build or buy a firearm in .300 HAM’R.