The Springfield Armory Hellcat Pro OSP Comp is a semi-auto 9mm pistol with a 3.7-inch barrel and 15+1 round capacity. It has a polymer frame, black finish, night sights, and an optics-ready slide cut. The OSP designation indicates the factory slide cut for direct optic mounting. 
 

Key Specifications 

• Brand: Springfield Armory 
• Model: Hellcat Pro OSP Comp 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 15+1 Rounds 
• Barrel Length: 3.7 in 
• Color/Finish: Black 
   

Detailed Features 

• Optics-ready slide cut (OSP) for direct optic mounting 
• Factory night sights 
• Polymer frame and grips 
• 3.7-inch barrel 
• 15+1 round capacity

Owners of the Hellcat Pro OSP Comp regularly mention the 15+1 capacity as the key reason for choosing this pistol. The combination of capacity and factory night sights at the price point is a frequently repeated purchase justification. OSP buyers tend to already have a preferred optic in mind and appreciate skipping a milling step.

The trigger gets split feedback. A portion of owners find the reset clean and consistent for both carry and range use, while others run an aftermarket trigger before putting the Pro Comp into regular rotation. Night sight quality draws generally positive notes, with a few owners reporting fitment variation on early production examples.

Long-term owners of the Hellcat Pro series often bring up reliability after break-in. The common pattern in owner feedback is a short break-in window before the pistol runs consistently, after which negative reliability reports are infrequent. The polymer frame gets good durability marks over extended use.