The rifle boasts an accuracy of 1.5 MOA, impressive for a semi-auto .50 calibre rifle. The barrel is free floated and features a dual chamber muzzle brake to reduce recoil, which is lower than that of the AW50 bolt action .50 BMG rifle. The two-part machined steel receiver features an integral accessory rail for the mounting of optical sights. Two additional rails are mounted on the sides of the short barrel shroud. An adjustable bipod and rear support leg/handgrip allow for stable shooting.
The AS50 weighs 14.1kg empty and holds 5 rounds of .50 BMG in a single stack removable box magazine.