The Banish 9 Suppressor Piston (brand part no. 100000311173) is a factory-fit replacement booster piston built for the Banish 9 suppressor, threaded 1/2×28 to match standard 9mm pistol hosts. It is the internal part that lets the Banish 9 cycle correctly on a semi-auto pistol, so keeping a spare on hand means normal wear never takes your suppressor out of service. Weighing well under an ounce, it drops in as a direct factory replacement with no modification required. It is a practical spare part for anyone running a Banish 9 suppressor as their primary 9mm can.

Key Specifications

• Threaded 1/2×28 to match standard 9mm pistol hosts without an adapter.
• Purpose-built as a booster piston for correct cycling on a semi-auto host.
• Sized specifically for the Banish 9 suppressor, a direct factory-fit replacement.
• Weighs approximately 0.8 ounces, keeping the suppressor’s balance unchanged.
• Rated for 9mm caliber use, matching the Banish 9’s intended chambering.

Frequently Asked Questions

What is this piston for? It is the internal booster piston that lets a Banish 9 suppressor cycle correctly on a semi-auto 9mm pistol host.

Is this a universal piston? No, it is built specifically for the Banish 9 with a 1/2×28 thread, not a universal fit for other suppressor brands.

Buy the Banish 9 Suppressor Piston

Don’t let a worn piston keep your Banish 9 off the range; keep a factory replacement on hand. Order it from Banish’s gunsmithing tools and supplies lineup, and our Lubbock, Texas gun shop will ship it out fast.