B18-04-1B Piston Seal

B18-04-1A Piston Seal for Optimus, Phantom, Quest, Shockwave, Vantage, TR77, MTR77, DPMS A4, Fire, Stealth Shot, Silver Fox, Fury, F4, Fire, Blaze, F11, Prowler, Varmint Power pack and Nitro venom.

Fits all modern Crosman and Benjamin break barrel rifles that use a spring or NP1 nitro piston