The Adams Arms' Mid Base AR-15 rifle is manufactured in USA. It features a short-stroke, free-floating piston system, adjustable gas settings, and is self cleaning. The lower receiver is made of aluminum with beveled magwell, machined chevrons in the front strap, while the upper has a 1913 Picatinny rail flat top with dry lube internal finish. The Mid Base also uses M4 style handguards, Mil-Spec trigger, and A2 grip.