Definitive Arms produces some of the finest AK47 based rifles and accessories on the market. Definitive Arms makes a wide variety innovative parts to enhance your Kalashnikov action. The DAG-13 Adjustable gas block is a major step forward in tuning your AK rifle. Add one of the Definitive Fighter Brakes to tame the muzzle rise and reduce felt recoil. Atlantic Firearms is proud to offer a variety of Definitive Arms parts both for sale and incorporated into complete rifles.