The Fostech Drone Predator is a 9mm Luger pistol built on a SIG P320 Compact platform with a 3.9-inch threaded barrel and a 17-round magazine. It has a grey slide, a gold barrel, and OD Green grip modules, and it is set up for optic mounting and suppressor or muzzle-device use out of the box. 
 

Key Specifications 

• Brand: Fostech 
• Model: Drone Predator 
• Caliber: 9mm Luger 
• Action: Semi-automatic 
• Capacity: 17 rounds 
• Barrel Length: 3.9 inches, threaded 1/2-28 
• Finish: Grey slide, gold barrel, OD Green grip modules 
   

Detailed Features 

• The 3.9-inch barrel is threaded 1/2-28 for a compensator, brake, or suppressor. 
• Slide cuts at the front and rear add a positive gripping surface for racking the slide. 
• Tritium night sights are set at optic height so they co-witness with a mounted red dot. 
• The slide has a dual-cut optic pattern that fits an RMR or Delta Point Pro footprint without a mounting plate. 
• Grayguns grip modules add a stippled texture across the frame for a more secure hold.

Owners of customized SIG P320-based pistols like the Drone Predator tend to focus on fit and function of the added parts, checking that the slide cuts, threading, and optic cut are machined cleanly. Reliability is usually tied back to the underlying P320 platform, which has a long track record, though a few owners note that heavily modified slides need a proper break-in before they run without issue.

The threaded 3.9-inch barrel and optic-height night sights are popular with people who plan to run a red dot and a suppressor or compensator, and the Grayguns grip texture is generally well liked for a secure hold in the hand. The OD Green and gold color scheme draws mixed reactions, with some owners loving the look and others preferring a more subdued finish.

On value, buyers weigh the price of a heavily customized pistol against building a P320 up piece by piece, and many see the Drone Predator as a way to skip that process. The main complaint from some owners is that parts and service for a modified pistol like this are less standardized than for a factory-stock gun.