Description
SilencerCo AC26 Osprey/Octane piston is a 9mm piston accessory built from 17-4 stainless steel and heat-treated for durability. It uses female threads to attach to SilencerCo threaded barrels as part of the Nielsen device system that allows semi-automatic cycling for unlocking pistol barrels. For fixed barrel applications, a fixed barrel spacer can be used.
- 17-4 stainless steel, heat-treated
- Female threading for SilencerCo threaded barrels
- 13.5×1 LH thread pattern
| Fits | Osprey/Octane |
|---|---|
| Part Type | Piston |
| Caliber | 9mm |
| Thread Pitch | 13.5×1 LH |
| Material | 17-4 stainless steel |



