SilencerCo AC728 Piston Kit | Osprey/Octane | 5-Piece | Black Nitride

This SilencerCo AC728 piston kit supplies the common piston sizes needed to adapt Osprey and Octane suppressors to a wide range of host firearms. The kit is centered on durability and wear resistance, offering black nitride finish on heat-treated stainless steel pistons. It is intended for routine suppressor maintenance and for switching host threads at the range or on the workbench.

Product Specifications

• The manufacturer is SilencerCo.
• The model designation is Osprey/Octane (AC728).
• The kit size is a 5-piece piston set.
• The pistons are finished in black nitride for increased wear resistance.
• The pistons are made from stainless steel (17-4 stainless per manufacturer text).
• The kit includes pistons in .578×28, 1/2×28, 16mm x 1 LH, 13.5mm x 1 LH, and 9/16×24 thread sizes.
• The kit includes Booster Assembly O-Ring Pack, M13 O-Ring Pack, and M16 O-Ring Pack.
• The listed thread type/pattern coverage is 1/2-28 to 5/8-24.
• The product type is Piston Kit.
• The series is listed as Piston Kit.
• The listed color is black.
• The kit is compatible with SilencerCo Osprey and Octane suppressors.
• The listed caliber/gauge association is .45 ACP.
• The UPC is 817272015294.

This kit reduces the guesswork when preparing an Osprey or Octane suppressor for a different host by providing the most commonly required piston sizes and necessary O-ring packs. The black nitride finish and stainless construction are chosen to extend service life under normal maintenance cycles, making this a practical component set for shooters who rotate hosts or perform regular suppressor upkeep.