One manufacturer, I'd have to say Browning. Various caliber semi-auto pistols, various caliber bolt rifles, various caliber semi rifles, even belt-fed rifles. Surprised no one mentioned FN. My favorite guns I own are my 1919A4 in 308, Browning Buckmark 22 rifle, and my Cobb BA50 50 BMG with 10 rd detachable mag and 22" barrel.