The Century Arms AP53 is a 5.56 NATO pistol built on an AR-pattern platform with an 8.3-inch threaded barrel and a 4-prong flash hider. It ships with a Magpul BSL pistol brace, a navy-style grip, and two 30-round magazines. The configuration is optic-friendly and accepts standard AR-pattern magazines. 
 

Key Specifications 

• Brand: Century Arms 
• Model: AP53 
• Caliber: 5.56 NATO 
• Action: Semi Auto 
• Capacity: 30+1 
• Barrel Length: 8.3 inches 
• Color/Finish: Black 
   

Detailed Features 

• 8.3-inch threaded barrel with 4-prong flash hider 
• Magpul BSL pistol brace (not a stock; short-barreled pistol configuration) 
• Navy-style pistol grip 
• Includes two 30-round magazines and sling 
• Accepts standard AR-pattern magazines

Owners of the AP53 tend to praise its compact AR-pattern layout in 5.56 NATO, saying the 8.3-inch barrel makes it easy to handle in tight spaces while still running the full rifle cartridge. The Magpul BSL brace gets consistent positive mentions for comfort and adjustability.

The 4-prong flash hider draws divided reactions. Some appreciate the retro look and effective flash suppression; others swap it immediately for a standard muzzle device. The navy-style grip splits opinion as well, with shooters noting it feels different from a standard A2 grip and takes some getting used to.

Value sentiment on the AP53 is generally positive given the included accessory package (brace, sling, two magazines). The common criticism is fit-and-finish on some examples, with a small number of owners reporting minor surface imperfections out of the box. Most describe reliability as solid after a break-in period.