This piston kit by silencer co.Contains 5 pistons and three o-ring packs.The kit features.578x28 piston (1), 1/2"x28 piston (1), 16mm x 1 lh piston (1), 13.5mm x 1 lh piston (1), and 9/16"x24 piston (1).This kit is made to fit the osprey and octane suppressors by silencer co.

Finish: Black Nitride
Type: Piston Kit
Model: Osprey/Octane
Size: 5 Piece
Material: Stainless Steel