The Citadel AD500 is a semi-automatic rifle chambered in .308 Win (7.62x51 NATO), built with a black synthetic stock and a 20-inch barrel. It feeds from a detachable box magazine and ships with a 5-round magazine for 5+1 capacity. Fiber optic sights and an integrated Picatinny rail cover both iron-sight use and optic mounting. 
 

Key Specifications 

• Brand: Citadel 
• Model: AD500 
• Caliber: .308 Win 
• Action: Semi Auto 
• Capacity: 5+1 rounds 
• Barrel Length: 20 in 
• Finish: Black 
• Material: Synthetic 
   

Detailed Features 

• Fiber optic front sight and adjustable fiber optic rear sight allow fast target acquisition without an optic mounted. 
• Integrated Picatinny rail gives a direct mounting surface for a red dot or scope. 
• Cross-bolt safety provides a simple, tactile on/off control. 
• Detachable box magazine feeds the action; the rifle ships with a 5-round magazine. 
• Rubber buttpad cuts down on felt recoil at the shoulder.

Owners of the AD500 generally find the semi-automatic action dependable once it is broken in, and the .308 chambering gets consistent praise for hitting harder at distance than the smaller-caliber rifles in the same price range. A few buyers note that ammunition choice affects reliability, which is common for gas guns in this cartridge.

On handling, the black synthetic stock is described as light and easy to carry in the field, and the fiber optic sights are well liked for quick target pickup at closer range. The integrated Picatinny rail makes mounting a scope straightforward for shooters who want to stretch the AD500 out to longer distances, and the rubber buttpad is appreciated by anyone putting a lot of rounds through it in one sitting.

On value, the AD500 is often picked as a more affordable route into a .308 semi-auto, and buyers like getting a detachable-magazine rifle with usable iron sights out of the box. The magazine capacity is fine for most range use, though some owners wish spare magazines were more widely stocked.