Wilson Combat's proprietary .300 HAM'R cartridge in a 16-inch AR-15-pattern carbine. The .300 HAM'R (Hunting AR Match Rifle) is a Wilson Combat wildcat offering ballistics between .300 BLK and .308 Win in a standard AR-15 lower receiver. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: .300 HAM'R Capacity: 30 Year introduced: 2017, USA Weight: 6.9 oz Overall length: 34.5" Status: Active Intended use: Hunting, Range, Suppressor Host