SilencerCo AC59 Osprey/Octane Piston .5x28XL 9mm Stainless Steel

The SilencerCo AC59 Osprey/Octane Piston delivers enhanced suppressor performance through precision-engineered stainless steel construction and extended .5x28XL threading. This replacement piston optimizes gas flow dynamics while maintaining consistent barrel alignment across multiple shooting sessions.

What Makes This Different

Unlike standard pistons that require frequent replacement, the AC59 features extended length threading that provides superior thread engagement and reduces wear on both the suppressor and barrel threads. The stainless steel construction resists corrosion and fouling buildup that commonly affects standard carbon steel pistons. Heat treatment processes ensure dimensional stability even after hundreds of rapid-fire sequences.

Key Features

• Precision-machined stainless steel construction for maximum durability
• Extended .5x28XL threading provides enhanced thread engagement
• Compatible with SilencerCo Osprey and Octane suppressor systems
• 9mm caliber specification optimized for subsonic and supersonic loads
• Corrosion-resistant finish maintains performance in adverse conditions
• Factory-toleranced dimensions ensure proper suppressor alignment
• Heat-treated components withstand rapid firing schedules

Field testing demonstrates consistent point-of-impact maintenance across extended shooting sessions, with minimal thread wear after 2,000+ round counts. The extended threading design distributes stress loads more effectively than standard-length pistons, reducing the likelihood of thread damage during suppressor installation and removal. Law enforcement agencies report improved suppressor longevity when using extended-thread piston systems in high-volume training environments.

Technical Specs

• Threading: .5x28XL (Extended Length)
• Caliber: 9mm
• Material: Stainless Steel
• Compatibility: SilencerCo Osprey and Octane suppressors
• Finish: Machined stainless steel
• Heat Treatment: Factory specification
• Country of Origin: United States

The AC59 piston represents a significant upgrade over factory-standard components, offering extended service life and improved suppressor performance. Professional users who demand consistent accuracy and reliability choose extended-thread pistons for critical applications where equipment failure is not acceptable.