The Springfield Armory XD Mod.4 OSP is a semi-automatic pistol chambered in 9mm with a 4-inch barrel. It has an optics-ready slide cut and comes in the GearPac configuration, which includes four 16-round magazines, an RFX-11 red dot optic, and a range bag. The pistol ships in black. 
 

Key Specifications 

• Brand: Springfield Armory 
• Model: XD Mod.4 OSP 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 4 in 
• Capacity: 16+1 
• Color/Finish: Black 
   

Detailed Features 

• Optics-ready slide (OSP) cut accepts red dot optics 
• GearPac bundle includes four 16-round magazines 
• Includes RFX-11 red dot optic 
• Includes pistol range bag 
• 4-inch barrel in a full-size frame

Owners of the XD Mod.4 OSP GearPac appreciate the value of the bundle. Getting four magazines and a red dot at the package price is a common talking point, and most buyers feel the RFX-11 optic is a usable zero-from-the-box option rather than a throwaway.

The XD platform's grip safety divides opinion. Fans say it adds peace of mind for holster carry; critics find it an unnecessary complication compared to other striker-fired designs. Ergonomics are generally regarded as comfortable, particularly for shooters with medium to large hands, though the grip shape is not universally liked.

Reliability is the platform's strongest reputation point. Long-term owners report consistent function across a wide range of 9mm ammunition. The aftermarket is solid but not as deep as some competing full-size pistols, and some owners note the OSP cut is proprietary, which limits direct-mount optic options.